{"product_id":"5890-21-0-90","title":"Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 21.0mm Head Dia","description":"\u003cp\u003eThe Robert Charles Single Flute Countersink 90° – M35 HSS-E 5% Cobalt – Metric is designed for precise countersinking, chamfering, and deburring of metric holes while delivering excellent surface finish and durability. Manufactured from premium M35 HSS-E with 5% cobalt, this tool offers increased heat resistance, higher hardness, and extended tool life, making it suitable for machining tougher materials such as stainless steel, alloy steels, and non-ferrous metals. M35 cobalt steel is specifically developed to improve cutting performance and longevity compared with standard HSS tooling.\u003c\/p\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43418552238158,"sku":"5890-21.0-90","price":53.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/ZERO_FLUTE_DEBURRING_TOOLS_b8be5a2a-814c-4b32-af55-b617f0b3e65e.png?v=1770028975","url":"https:\/\/www.protool-ltd.co.uk\/products\/5890-21-0-90","provider":"Protool Precision Tools","version":"1.0","type":"link"}