Check the listing for details. Multi-Sharp Drill Bit Sharpener Replacement Grinding Wheel - Aluminum Oxide. Condition: New. Listed at 7.95 USD. Multi-Sharp Drill Bit Sharpener Replacement Grinding Wheel Choose between Aluminum Oxide and Silicon Carbide Made to fit Drill Bit Sharpener (#2001) Aluminum Oxide For resharpening wood and metal drill bits Dia 36mm, max 3000rpm Comes with two replacement nylon bearings and fitting instructions #2002 Silicon Carbide For resharpening masonry and hammer bits, flat wood bits and re-edging small tools Dia 36mm, max 3000rpm Comes with two replacement nylon bearings and fitting instructions #2003 Multi-Sharp is The Specialist in Tool Sharpeners. For a tool to cut well, it's important that not only the cutting edge is sharp, but the cutting angle is correct as well. Each of our sharpeners is designed for the particular tool and the built-in Location Guide takes the guesswork out of sharpening the blade correctly.