Check the listing for details. Diamond Lapidary Grinding Wheel, "V", 4"x1/2"; 400 grit. Condition: New. Listed at 55.00 USD. Diamond "V" Grinding Wheel, 4"x1/2" 4" x 1/2" Diamond Grinding Wheel400 grit The hole size is 1 inch.Upon request, we can supply hole size adapters that will allow the wheel to fit on 1/2", 5/8" or 3/4" arbors at no charge as long as they are shipped with the grinding wheel. This is a high quality diamond grinding wheel. Check our other ebay listings and ebay Store for 4"x1-1/2", 6"x1-1/2" and 8"x1-1/2" diamond grinding wheels in 60, 80, 120, 220, 400 and 600 grit sizes. Shipping and handling to USA destinations:Free Shipping Caution: Always use goggles and water when using grinding wheels. Use water to lubricate these grinding wheels. We use these tools in our jadecarver workshop and they work great on jade. Return Requirements:Grinding wheels cannot have been used and the wheels and boxes they came in must be returned in new condition so they can be resold as new.May be returned within 30 days of purchase _gsrx_vers_486 (GS 6.5.1 (486))