{"product_id":"21-64-x-3-32-straight-shank-counterbore-5-16-round-shank-3-flute-hss_dewcbr21-64","title":"21\/64\" X 3\/32\" Straight Shank Counterbore | HSS | 5\/16\" Round Shank | 3 Flute | DEWCBR21\/64","description":"\u003cdiv\u003e\n\u003cp\u003eProfessional counterbore tool engineered for precision metalworking applications. The 3-flute HSS design supports high RPM milling and provides reliable counterbore results in steel, aluminum, and other alloys across CNC and manual operations.\u003c\/p\u003e \u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 21\/64 inch x 3\/32 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShank options:\u003c\/b\u003e Straight Shank Counterbore; 5\/16 inch Round Shank\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial grade:\u003c\/b\u003e HSS\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e3-flute design\u003c\/b\u003e: improves chip evacuation and cutting stability in metalworking applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: HSS (high-speed steel) provides wear resistance and heat tolerance in high-speed milling operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCounterbore functionality\u003c\/b\u003e: enables flush seating of fasteners and clean joint surfaces in metal assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShank compatibility\u003c\/b\u003e: supportsStraight Shank Counterbore and 5\/16 inch Round Shank interfaces for versatile toolholding. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":53412333945111,"sku":"DEWCBR21\/64","price":26.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/4.jpg?v=1779454687","url":"https:\/\/mutualscrew.com\/products\/21-64-x-3-32-straight-shank-counterbore-5-16-round-shank-3-flute-hss_dewcbr21-64","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}