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Dormer Pramet A125 6.50 mm x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328
| Type | Extra Long Series |
| Drill Diameter | 6.50 |
| Flute Length | 250 |
| Overall Length | 310 |
| Shank Diameter | 6.5 |
| Substrate | HSS |
Learn more about Klarna
- 118-degree conventional point provides a strong, self-centering starting bite that stays true during entry and exits. The geometry supports easy re-grinding, helping you extend the tool’s life with minimal downtime.
- Steam oxide finish minimizes material adhesion to the cutting edge, promoting smoother chip flow and reducing built-up edge. That means cleaner holes and less friction as you drill.
- Extra long length of 310 mm is purpose-built for drilling very deep holes and for applications where increased reach is required—perfect for through-holes in assemblies or workpieces with limited access.
- Premium HSS material delivers dependable performance across a range of common materials, including steel, aluminium, and stainless steel. The A125 retains hardness at drilling speeds that balance productivity and edge life.
- Straight shank design ensures broad compatibility with standard drill chucks and machines, providing stable cutting and consistent runout in longer-hole applications.
- Versatile, task-focused tool capable of handling a variety of workshop, fabrication, and maintenance jobs. Ideal for mechanics, fabricators, and DIY enthusiasts tackling deep-hole projects with one trusted drill bit.
In practical use, this drill shines in scenarios where depth, reach, and consistent hole quality matter. For best results, pair the drill with appropriate pecking cycles to clear chips, use light lubrication to manage heat, and maintain steady feed pressure to preserve the 118-degree point geometry across multiple holes. The A125 is designed to be a reliable workhorse for deep-hole tasks, reducing tool changes and increasing throughput on demanding projects.

| Type | Extra Long Series |
| Drill Diameter | 6.50 |
| Flute Length | 250 |
| Overall Length | 310 |
| Shank Diameter | 6.5 |
| Substrate | HSS |
| Coated | Steam Tempered |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Dormer Pramet A125 HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILLS BS 328
View full collection →You are viewing DOR-A1256.5X315. Click any other SKU to view its full details.
| Product SKU | Drill Diameter | Flute Length | Overall Length | Shank Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|
| DOR-A1251.4X160 | 1.40 | 100 | 160 | 1.4 | £18.83 | 2 days | |
| DOR-A1251.5X125 | 1.50 | 80 | 125 | 1.5 | £10.72 | 2 days | |
| DOR-A1251.5X160 | 1.50 | 100 | 160 | 1.5 | £12.72 | 2 days | |
| DOR-A1251/16X125 | 1/16 | 80 | 125 | 1.59 | £13.07 | 2 days | |
| DOR-A1251/16X160 | 1/16 | 100 | 160 | 1.59 | £15.64 | 2 days | |
| DOR-A1251.8X160 | 1.80 | 100 | 160 | 1.8 | £16.45 | 2 days | |
| DOR-A1255/64X160 | 5/64 | 100 | 160 | 1.98 | £16.14 | 2 days | |
| DOR-A1255/64X125 | 5/64 | 80 | 125 | 1.98 | £15.49 | 2 days | |
| DOR-A1252.0X125 | 2.00 | 80 | 125 | 2 | £8.30 | 2 days | |
| DOR-A1252.0X160 | 2.00 | 100 | 160 | 2 | £9.76 | 2 days | |
| DOR-A1252.2X160 | 2.20 | 100 | 160 | 2.2 | £10.11 | 2 days | |
| DOR-A1253/32X160 | 3/32 | 100 | 160 | 2.38 | £9.79 | 2 days | |
| DOR-A1253/32X125 | 3/32 | 80 | 125 | 2.38 | £8.94 | 2 days | |
| DOR-A1252.5X125 | 2.50 | 80 | 125 | 2.5 | £7.84 | 2 days | |
| DOR-A1252.5X160 | 2.50 | 100 | 160 | 2.5 | £9.65 | 2 days | |
| DOR-A1257/64X125 | 7/64 | 80 | 125 | 2.78 | £9.47 | 2 days | |
| DOR-A1257/64X160 | 7/64 | 100 | 160 | 2.78 | £14.50 | 2 days | |
| DOR-A1253.0X160 | 3.00 | 100 | 160 | 3 | £9.17 | 2 days | |
| DOR-A1253.0X200 | 3.00 | 150 | 200 | 3 | £12.25 | 2 days | |
| DOR-A1253.0X250 | 3.00 | 200 | 250 | 3 | £15.53 | 2 days | |
| DOR-A1251/8X160 | 1/8 | 100 | 160 | 3.18 | £11.26 | 2 days | |
| DOR-A1251/8X200 | 1/8 | 150 | 200 | 3.18 | £11.45 | 2 days | |
| DOR-A1251/8X250 | 1/8 | 200 | 250 | 3.18 | £22.28 | 2 days | |
| DOR-A1251/8X315 | 1/8 | 250 | 310 | 3.18 | £25.63 | 2 days | |
| DOR-A1253.3X160 | 3.30 | 100 | 160 | 3.3 | £13.22 | 2 days | |
| DOR-A1253.5X160 | 3.50 | 100 | 160 | 3.5 | £9.30 | 2 days | |
| DOR-A1253.5X200 | 3.50 | 150 | 200 | 3.5 | £11.48 | 2 days | |
| DOR-A1253.5X250 | 3.50 | 200 | 250 | 3.5 | £16.17 | 2 days | |
| DOR-A1259/64X160 | 9/64 | 100 | 160 | 3.57 | £16.32 | 2 days | |
| DOR-A1259/64X200 | 9/64 | 150 | 200 | 3.57 | £16.42 | 2 days | |
| DOR-A1259/64X315 | 9/64 | 250 | 310 | 3.57 | £23.76 | 2 days | |
| DOR-A1255/32X160 | 5/32 | 100 | 160 | 3.97 | £11.43 | 2 days | |
| DOR-A1255/32X200 | 5/32 | 150 | 200 | 3.97 | £13.53 | 2 days | |
| DOR-A1255/32X250 | 5/32 | 200 | 250 | 3.97 | £26.08 | 2 days | |
| DOR-A1255/32X315 | 5/32 | 250 | 310 | 3.97 | £33.11 | 2 days | |
| DOR-A1254.0X160 | 4.00 | 100 | 160 | 4 | £9.33 | 2 days | |
| DOR-A1254.0X200 | 4.00 | 150 | 200 | 4 | £12.04 | 2 days | |
| DOR-A1254.0X250 | 4.00 | 200 | 250 | 4 | £16.13 | 2 days | |
| DOR-A1254.0X315 | 4.00 | 250 | 310 | 4 | £20.00 | 2 days | |
| DOR-A12511/64X160 | 11/64 | 100 | 160 | 4.37 | £15.03 | 2 days | |
| DOR-A12511/64X200 | 11/64 | 150 | 200 | 4.37 | £18.10 | 2 days | |
| DOR-A12511/64X315 | 11/64 | 250 | 310 | 4.37 | £26.08 | 2 days | |
| DOR-A1254.5X160 | 4.50 | 100 | 160 | 4.5 | £10.84 | 2 days | |
| DOR-A1254.5X200 | 4.50 | 150 | 200 | 4.5 | £14.21 | 2 days | |
| DOR-A1254.5X250 | 4.50 | 200 | 250 | 4.5 | £21.78 | 2 days | |
| DOR-A1254.5X315 | 4.50 | 250 | 310 | 4.5 | £23.80 | 2 days | |
| DOR-A1253/16X160 | 3/16 | 100 | 160 | 4.76 | £10.99 | 2 days | |
| DOR-A1253/16X200 | 3/16 | 150 | 200 | 4.76 | £12.52 | 2 days | |
| DOR-A1253/16X250 | 3/16 | 200 | 250 | 4.76 | £15.94 | 2 days | |
| DOR-A1253/16X315 | 3/16 | 250 | 310 | 4.76 | £23.30 | 2 days | |
| DOR-A1253/16X400 | 3/16 | 300 | 400 | 4.76 | £44.05 | 2 days | |
| DOR-A1255.0X160 | 5.00 | 100 | 160 | 5 | £10.53 | 2 days | |
| DOR-A1255.0X200 | 5.00 | 150 | 200 | 5 | £13.86 | 2 days | |
| DOR-A1255.0X250 | 5.00 | 200 | 250 | 5 | £17.24 | 2 days | |
| DOR-A1255.0X315 | 5.00 | 250 | 310 | 5 | £23.89 | 2 days | |
| DOR-A1255.0X400 | 5.00 | 300 | 400 | 5 | £30.42 | 2 days | |
| DOR-A12513/64X200 | 13/64 | 150 | 200 | 5.16 | £21.57 | 2 days | |
| DOR-A12513/64X250 | 13/64 | 200 | 250 | 5.16 | £27.95 | 2 days | |
| DOR-A12513/64X315 | 13/64 | 250 | 310 | 5.16 | £36.71 | 2 days | |
| DOR-A1255.5X200 | 5.50 | 150 | 200 | 5.5 | £12.84 | 2 days | |
| DOR-A1255.5X250 | 5.50 | 200 | 250 | 5.5 | £20.75 | 2 days | |
| DOR-A1255.5X315 | 5.50 | 250 | 310 | 5.5 | £32.83 | 2 days | |
| DOR-A1257/32X200 | 7/32 | 150 | 200 | 5.56 | £16.69 | 2 days | |
| DOR-A1257/32X250 | 7/32 | 200 | 250 | 5.56 | £21.33 | 2 days | |
| DOR-A12515/64X200 | 15/64 | 150 | 200 | 5.95 | £25.86 | 2 days | |
| DOR-A12515/64X315 | 15/64 | 250 | 310 | 5.95 | £24.81 | 2 days | |
| DOR-A1256.0X200 | 6.00 | 150 | 200 | 6 | £14.91 | 2 days | |
| DOR-A1256.0X250 | 6.00 | 200 | 250 | 6 | £19.96 | 2 days | |
| DOR-A1256.0X315 | 6.00 | 250 | 310 | 6 | £24.85 | 2 days | |
| DOR-A1256.0X400 | 6.00 | 300 | 400 | 6 | £36.16 | 2 days | |
| DOR-A1251/4X200 | 1/4 | 150 | 200 | 6.35 | £16.32 | 2 days | |
| DOR-A1251/4X250 | 1/4 | 200 | 250 | 6.35 | £20.69 | 2 days | |
| DOR-A1251/4X315 | 1/4 | 250 | 310 | 6.35 | £25.63 | 2 days | |
| DOR-A1251/4X400 | 1/4 | 300 | 400 | 6.35 | £52.44 | 2 days | |
| DOR-A1251/4X500 | 1/4 | 400 | 460 | 6.35 | £72.96 | 2 days | |
| DOR-A1256.5X200 | 6.50 | 150 | 200 | 6.5 | £17.10 | 2 days | |
| DOR-A1256.5X250 | 6.50 | 200 | 250 | 6.5 | £21.20 | 2 days | |
| DOR-A1256.5X315 Viewing | 6.50 | 250 | 310 | 6.5 | £30.64 | 2 days | |
| DOR-A12517/64X200 | 17/64 | 150 | 200 | 6.75 | £21.11 | 2 days | |
| DOR-A12517/64X250 | 17/64 | 200 | 250 | 6.75 | £28.41 | 2 days | |
| DOR-A12517/64X500 | 17/64 | 400 | 460 | 6.75 | £72.96 | 2 days | |
| DOR-A1257.0X200 | 7.00 | 150 | 200 | 7 | £18.45 | 2 days | |
| DOR-A1257.0X250 | 7.00 | 200 | 250 | 7 | £23.58 | 2 days | |
| DOR-A1257.0X315 | 7.00 | 250 | 310 | 7 | £33.24 | 2 days | |
| DOR-A1257.5X200 | 7.50 | 150 | 200 | 7.5 | £22.12 | 2 days | |
| DOR-A1257.5X250 | 7.50 | 200 | 250 | 7.5 | £26.68 | 2 days | |
| DOR-A1257.5X315 | 7.50 | 250 | 310 | 7.5 | £34.56 | 2 days | |
| DOR-A1255/16X200 | 5/16 | 150 | 200 | 7.94 | £20.93 | 2 days | |
| DOR-A1255/16X250 | 5/16 | 200 | 250 | 7.94 | £26.36 | 2 days | |
| DOR-A1255/16X315 | 5/16 | 250 | 310 | 7.94 | £34.88 | 2 days | |
| DOR-A1255/16X500 | 5/16 | 400 | 460 | 7.94 | £86.18 | 2 days | |
| DOR-A1258.0X250 | 8.00 | 200 | 250 | 8 | £26.04 | 2 days | |
| DOR-A1258.0X315 | 8.00 | 250 | 310 | 8 | £35.07 | 2 days | |
| DOR-A1258.0X400 | 8.00 | 300 | 400 | 8 | £44.23 | 2 days | |
| DOR-A12521/64X315 | 21/64 | 250 | 310 | 8.33 | £64.30 | 2 days | |
| DOR-A1258.5X250 | 8.50 | 200 | 250 | 8.5 | £35.66 | 2 days | |
| DOR-A1258.5X315 | 8.50 | 250 | 310 | 8.5 | £47.88 | 2 days | |
| DOR-A12511/32X250 | 11/32 | 200 | 250 | 8.73 | £34.06 | 2 days | |
| DOR-A12511/32X315 | 11/32 | 250 | 310 | 8.73 | £58.37 | 2 days | |
| DOR-A12511/32X400 | 11/32 | 300 | 400 | 8.73 | £72.05 | 2 days | |
| DOR-A12511/32X500 | 11/32 | 400 | 460 | 8.73 | £86.18 | 2 days | |
| DOR-A1259.0X250 | 9.00 | 200 | 250 | 9 | £30.87 | 2 days | |
| DOR-A1259.0X315 | 9.00 | 250 | 310 | 9 | £39.31 | 2 days | |
| DOR-A1259.0X400 | 9.00 | 300 | 400 | 9 | £56.54 | 2 days | |
| DOR-A1259.5X250 | 9.50 | 200 | 250 | 9.5 | £36.98 | 2 days | |
| DOR-A1259.5X315 | 9.50 | 250 | 310 | 9.5 | £49.70 | 2 days | |
| DOR-A1253/8X250 | 3/8 | 200 | 250 | 9.52 | £33.61 | 2 days | |
| DOR-A1253/8X315 | 3/8 | 250 | 310 | 9.52 | £42.59 | 2 days | |
| DOR-A1253/8X400 | 3/8 | 300 | 400 | 9.52 | £53.81 | 2 days | |
| DOR-A1253/8X500 | 3/8 | 400 | 460 | 9.52 | £74.33 | 2 days | |
| DOR-A12510.0X250 | 10.00 | 200 | 250 | 10 | £35.52 | 2 days | |
| DOR-A12510.0X315 | 10.00 | 250 | 310 | 10 | £44.19 | 2 days | |
| DOR-A12510.0X400 | 10.00 | 300 | 400 | 10 | £65.21 | 2 days | |
| DOR-A12513/32X250 | 13/32 | 200 | 250 | 10.32 | £44.32 | 2 days | |
| DOR-A12513/32X315 | 13/32 | 250 | 310 | 10.32 | £54.72 | 2 days | |
| DOR-A12510.5X250 | 10.50 | 200 | 250 | 10.5 | £44.28 | 2 days | |
| DOR-A12510.5X315 | 10.50 | 250 | 310 | 10.5 | £57.46 | 2 days | |
| DOR-A12510.5X400 | 10.50 | 300 | 400 | 10.5 | £68.86 | 2 days | |
| DOR-A12511.0X250 | 11.00 | 200 | 250 | 11 | £40.04 | 2 days | |
| DOR-A12511.0X315 | 11.00 | 250 | 310 | 11 | £51.07 | 2 days | |
| DOR-A12511.0X400 | 11.00 | 300 | 400 | 11 | £63.38 | 2 days | |
| DOR-A1257/16X250 | 7/16 | 200 | 250 | 11.11 | £49.25 | 2 days | |
| DOR-A1257/16X315 | 7/16 | 250 | 310 | 11.11 | £62.02 | 2 days | |
| DOR-A1257/16X400 | 7/16 | 300 | 400 | 11.11 | £129.05 | 2 days | |
| DOR-A12529/64X315 | 29/64 | 250 | 310 | 11.51 | £57.46 | 2 days | |
| DOR-A12512.0X250 | 12.00 | 200 | 250 | 12 | £46.97 | 2 days | |
| DOR-A12512.0X315 | 12.00 | 250 | 310 | 12 | £54.72 | 2 days | |
| DOR-A12512.0X400 | 12.00 | 300 | 400 | 12 | £73.42 | 2 days | |
| DOR-A12531/64X315 | 31/64 | 250 | 310 | 12.3 | £57.46 | 2 days | |
| DOR-A1251/2X250 | 1/2 | 200 | 250 | 12.7 | £57.00 | 2 days | |
| DOR-A1251/2X315 | 1/2 | 250 | 310 | 12.7 | £72.96 | 2 days | |
| DOR-A1251/2X400 | 1/2 | 300 | 400 | 12.7 | £95.76 | 2 days | |
| DOR-A12513.0X315 | 13.00 | 250 | 310 | 13 | £58.37 | 2 days | |
| DOR-A12513.0X400 | 13.00 | 300 | 400 | 13 | £74.33 | 2 days | |
| DOR-A12517/32X315 | 17/32 | 250 | 310 | 13.49 | £58.37 | 2 days | |
| DOR-A12514.0X315 | 14.00 | 250 | 310 | 14 | £69.31 | 2 days | |
| DOR-A12514.0X400 | 14.00 | 300 | 400 | 14 | £81.17 | 2 days | |
| DOR-A1259/16X315 | 9/16 | 250 | 310 | 14.29 | £69.31 | 2 days | |
| DOR-A12537/64X315 | 37/64 | 250 | 310 | 14.68 | £69.31 | 2 days | |
| DOR-A12519/32X315 | 19/32 | 250 | 310 | 15.08 | £69.31 | 2 days | |
| DOR-A12519/32X500 | 19/32 | 400 | 460 | 15.08 | £93.02 | 2 days | |
| DOR-A1255/8X315 | 5/8 | 250 | 310 | 15.88 | £69.31 | 2 days | |
| DOR-A1255/8X500 | 5/8 | 400 | 460 | 15.88 | £93.02 | 2 days | |
| DOR-A12511/16X315 | 11/16 | 250 | 310 | 17.46 | £69.31 | 2 days | |
| DOR-A1253/4X315 | 3/4 | 250 | 310 | 19.05 | £70.68 | 2 days | |
| DOR-A1253/4X500 | 3/4 | 400 | 460 | 19.05 | £95.30 | 2 days |
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