The abrasive stone head is high quality material red corundum sand with uniform particles, sharper and more durable, good abrasion resistance, can be used for long time. Able to remove rust from metal castings and will not rust or fall out like the steel brush. tool grinding stone wheel head can play an excellent polishing effect with uniform grit, wear-resistant, abrasive grain cutting sharp, grinding stainless steel and other metals with less dust, much faster grinding, save time-off. The surface is cleaner and brighter after polishing.The sanding wheel set contains 3 sizes of grinding stone: 10mm cylinder shape, 15mm cylinder shape, 10mm shape(14 pcs each size). The 1/8inch(3mm) can be used with drills and most tools.Abrasive mounted stone grinding set suitable for trimming, polishing and grinding a variety of objects:mold, metal, plastic, jade, agate and wood, etc. Multiple design fit into tight spaces for other grinding and shaping needs, such as curved, flat and slotted surfaces.color:As shownMaterial:Chrome corundumPackage Contents:1 set x for grinding stones(42Pcs)Only the above package content, other products are not included.Note: Light reflection 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.