Uxcell 1mm Ball Tip 3mm Shank Grinding Diamond Bits Set, 30-Piece Product Name : Grinding Diamond Burr Bits Set;Shape : Ball Shape Tip;Material : Alloy Shank Diameter(Each) : 3mm / 0.12inch;Total Length(Each) : 46mm / 1.8inch Diamond Coated Length : 1.2mm/ 0.047inch;Tip Dia : 1mm/ 0.039inch Case Size : 145 x 61 x 19mm / 5.7inch x 2.4inch x 0.73inch(LWT);Main Color : Silver Tone Total Weight : 65g;Package Content : 30 Pcs x Grinding Burr Bits,1 x Plastic Case