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2-1\/2\"Large Step Bit, M35 HSS Impact Tough Step Bits for Metal, 1\/2\" Shank Unibit Step Drill Bits, Stainless Steel, Aluminum, Wood\u003c\/h3\u003e\n\u003cp id=\"b\"\u003e\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003eM35 HSS COBALT STEP DRILL - GrenPRO drill bits Specially designed for Metal Sheet\/Wood\/Plastic\/Aluminum\/Copper with 15 progressive steps (1\/4\" to 2-1\/2\")\u003c\/li\u003e\n \u003cli\u003eTiAlN COATING - Our step drill bit surface hardness enables 68% faster drilling efficiency and 450% longer lifespan than conventional drills\u003c\/li\u003e\n \u003cli\u003eSTREAMLINED SIZE TRANSITION - Laser-calibrated step drill bit for metal ensure burr-free drilling from 6mm to 63mm without changing bits\u003c\/li\u003e\n \u003cli\u003eUNIVERSAL 1\/4\" HEX SHANK - Secure grip for lithium-ion drills\/hand drills\/bench drills with anti-slip laser etching(1\/4\"=6.35 mm)\u003c\/li\u003e\n \u003cli\u003eWARRANTY - Contact GRENPRO for instant replacement with no questions asked\u003c\/li\u003e\n \u003c\/ul\u003e"}