ITEM NAME:30 Diamond Grinding Head Round 2Mm Drill Bit Coated Ball Burr Handle 3Mm fo W8L5 30 Diamond Grinding Head Round 2Mm Drill Bit Coated Ball Burr Handle 3Mm fo W8L5 Sanding tool Type:Abrasive Block DIY Supplies:Tiling They will fit your hand drill,drill press with a 1/8 inch collet Use with water as a lubricant is better Suitable for use in grind the edge of glass,marble,rock or jewelry.And apply to drilling glass,shells,tile and stone. colour:Silver + yellow Material:Diamond Size:Crown Size:2mm Package Contents: 30*Sanding tool Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.