uxcell 30Pcs 2.3mm Shank Diamond Coated Taper Mounted Point Tip Grinding Bits Product Name : Diamond Mounted Point;Shaped : Taper Point Material : Alloy, Diamond;Shank Diameter(Each) : 2.3mm / 0.09" Total Length(Each) : 45mm / 1.8";Diamond Coated Length : 10mm/ 0.4" Head Max. Diameter : 1.6mm/ 0.06";Main Color : Silver Tone Total Weight : 79g;Package Conten : 30 x DiamondMounted Points1 x Plastic Case