{"product_id":"5890-12-5-90","title":"Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 12.5mm Head Dia","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Robert Charles Single Flute Countersink 90° – M35 HSS-E 5% Cobalt – Metric is a precision tool designed for accurate countersinking, chamfering, and deburring of metric holes. It’s ideal for machinists, fabricators, service technicians, and hobbyists who demand clean, flush finishes and dependable results.\n\u003c\/p\u003e \u003cp\u003e\nCrafted from premium M35 cobalt-enhanced high-speed steel, this countersink delivers exceptional hardness and heat resistance, so it stays sharp through stainless steel, alloy steels, and even non-ferrous metals. The 12.5 mm head diameter provides a robust cutting zone for reliable, repeatable performance.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePremium M35 HSS-E with 5% Cobalt\u003c\/b\u003e: Delivers higher hardness and heat resistance than standard HSS, extending tool life when countersinking tough metals and preventing rapid dulling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecise 90° Single-Flute Design\u003c\/b\u003e: Delivers clean, consistent chamfers with reduced chatter, improving surface finish and reducing burrs on every hole.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMetric-Grade Construction for Tough Materials\u003c\/b\u003e: Optimized for metric holes and materials like stainless steel and alloy steels, maintaining sharpness and delivering reliable results across demanding jobs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis countersink helps you finish jobs faster with fewer corrections. The combination of a hard, cobalt-rich steel and a focused 90° geometry delivers consistent depth and smooth cuts, so assemblies sit flush every time. With longer tool life and dependable performance, you’ll experience less downtime, fewer replacements, and a smoother workflow from drilling to final deburring.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43418552107086,"sku":"5890-12.5-90","price":32.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/ZERO_FLUTE_DEBURRING_TOOLS_53b43422-27e1-4798-963b-9f7fd5e7c427.png?v=1770028960","url":"https:\/\/www.protool-ltd.co.uk\/products\/5890-12-5-90","provider":"Protool Precision Tools","version":"1.0","type":"link"}