{"product_id":"5890-14-0-90","title":"Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 14.0mm Head Dia","description":"\u003cdiv\u003e\n\u003cp\u003eThe Robert Charles Single Flute Countersink 90° is a precision cutting tool engineered for accurate countersinking, chamfering, and deburring of metric holes. It’s ideal for engineers, machinists, and hobbyists who need reliable, repeatable results on a range of materials—from stainless steel to non‑ferrous metals. With a 14.0 mm head diameter, it provides a dependable starting point for common metric hole sizes and delivers clean, flat entry surfaces in a single pass.\u003c\/p\u003e \u003cp\u003eCrafted from premium M35 HSS-E with 5% cobalt, this countersink delivers superior heat resistance and edge retention compared with standard high-speed steel. The cobalt-rich composition helps maintain sharpness under demanding cutting conditions, extending tool life and reducing downtime when working tough materials such as stainless steel and alloy steels.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e14.0 mm Head Diameter\u003c\/b\u003e: Provides a consistent countersink depth for metric holes, enabling uniform chamfers and reliable results across your project.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eM35 HSS-E with 5% Cobalt\u003c\/b\u003e: Delivers enhanced hardness and heat resistance for longer life and better performance on tough materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e90° Single-Flute Geometry\u003c\/b\u003e: Ensures clean, precise countersinks with smooth chip evacuation and minimal chatter for a professional finish.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis countersink helps you move faster with predictable, high-quality results—from first part to last. Its robust construction and sharp cutting edge support efficient workflows, reduced rework, and consistently professional finishes on metric holes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43418552139854,"sku":"5890-14.0-90","price":36.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/ZERO_FLUTE_DEBURRING_TOOLS_ae1293b8-1100-4287-8469-6b15a4b69cba.png?v=1770028965","url":"https:\/\/www.protool-ltd.co.uk\/products\/5890-14-0-90","provider":"Protool Precision Tools","version":"1.0","type":"link"}