75-100mm 3-4" Digital Outside Micrometer - 3109 Series (Insize)

The 75-100 mm (3-4") Digital Outside Micrometer from Insize 3109 Series is a compact, high-precision tool designed for quick external measurements across machining, assembly, and quality-control environments. With a clear digital display and a broad 75–100 mm range, it makes accurate dimension checks faster than traditional dial calipers, whether you’re in a workshop, lab, or field service situation.

• High‑resolution digital readout: Obtain precise measurements at a glance with 0.001 mm (0.00005") resolution, helping you verify tolerances quickly and confidently.
• Durable carbide faces and spherical anvil: Rugged carbide measuring faces resist wear for long tool life, while the spherical anvil ensures stable contact on a variety of parts; the ratchet thimble lets you apply consistent pressure with one hand.
• Flexible setup and calibration: Measures in mm or inches with ABS/INC options, powered by a common SR44 or LR44 battery, and includes setting standards (except 0-25 mm/0-1"); a user‑friendly design supports reliable readings across multiple tasks.

This digital outside micrometer streamlines your workflow by delivering fast, repeatable measurements while standing up to daily use in demanding environments. The combination of precise readouts, durable construction, and easy calibration helps you reduce rework, improve measurement consistency, and confidently document performance in quality checks and production cycles.