{"product_id":"8-inch-hex-shank-core-drill-bit-extension-adapter","title":"8 Inch Hex Shank Core Drill Bit Extension Adapter With 1-1\/4-7 UNC Thread Beefy 42Cr4 Steel Extension Rod For Diamond Hole Core Bits And Saw Threaded Bits No-Slip Shank Rotation For Smooth Drilling","description":"\u003cdiv\u003e8-Inch Hex Shank Core Drill Extension for Deep Masonry\u003cbr\u003e\n✔️ Hex shank 1-1\/4-7 UNC; 8-20 in lengths, 6-18 in working \u003cp\u003eThis 8 inch hex shank core drill extension adapter extends diamond core bits for deeper, cleaner holes in concrete, brick, and masonry. Its hex profile prevents slippage in the chuck and helps transfer high torque for tough drilling jobs.\u003c\/p\u003e ✅ Connection: 1-1\/4-7 UNC thread (fits standard core drill bits) \u003cbr\u003e\n✅ Length options: 8\" (200 mm), 12\" (300 mm), 16\" (400 mm), 20\" (500 mm) \u003cbr\u003e\n✅ Effective working lengths: 6\" (150 mm), 10\" (250 mm), 14\" (350 mm), 18\" (450 mm) \u003cbr\u003e\n✅ Material: 42Cr4 steel (DIN 1.7045) with black oxide finish \u003cbr\u003e\n✅ Water through-hole enables continuous coolant during wet drilling \u003cbr\u003e\n✅ Hex size SW 41 mm (1.61\") for secure wrench engagement \u003cbr\u003e\n✅ Not for hammer mode; designed for core bits and saw-thread bits \u003cbr\u003e\n✅ Pack: single extension unit per length option \u003cbr\u003e \u003cp\u003e💡 What is a core drill extension hex shank used for?\u003c\/p\u003e\nThis handy accessory helps you reach deep into hard materials with steady torque. - Increases reach for deep drilling in concrete and masonry\n- Prevents chuck slippage due to hex profile\n- Supports high-torque transfer for demanding drilling tasks\n- Keeps coolant flowing through the extension during wet drilling\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48229771804907,"sku":"VXB0FZTFK4TT","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/61zn0skDCKL.jpg?v=1778822270","url":"https:\/\/vxb.com\/products\/8-inch-hex-shank-core-drill-bit-extension-adapter","provider":"VXB Bearings","version":"1.0","type":"link"}