uxcell 3mm x 6mm Ball Head Diamond Points Grinding Drill Bit 30 Pcs Product Name : Grinding Diamond Bits;Tip Shape : Ball Head Material : Alloy, Diamond;Shank Diameter(Each) : 3mm / 0.12" Each Length : 44mm/ 1.7";Tip Diameter : 6mm/ 0.24" Case Size : 144 x 60 x 20mm / 5.7" x 2.4" x 0.8"(L*W*T);Color : Silver Tone Total Weight : 132g;Package Content : 30 Pcs x Diamond Mounted Points1 x Plastic Case