10 Pcs 1/8 Shank Abrasive Mounted Stone Rotary Tool Grinding Wheels Bit Set For Dremel Material : Chrome corundum Shank diameter : 1/8ich(3mm) Total length : 44mm; Head diameter : 4mm/ 5mm/ 6mm/ 8mm/ 10mm Shape : Flat head cylindrical, bullet tip type Package include:10x diamond grinding heads