uxcell 3mm x 1mm Cylinder Head Buffing Bits Diamond Mounted Point 30 Pcs Product Name : Diamond Mounted Point;Material : Metal,Diamond Shank Diameter : 3mm / 0.12";CuttingDiameter : 1mm / 0.04" Diamond CoatedLength : 8mm / 0.3";Total Length : 45mm / 1.8" Color : Silver Tone;Weight : 97g Package Content : 30 x Diamond Mounted Point 1 x Plastic Case