Maximum Rotation Possible: 30.000 per minute (rpm); Round cylindrical shape; Diamond cut eyes; Weight: 15.4 lbs (7 kg); Size: Total length 2.0 x 0.1 inches (51 x 3 mm); Tip: 0.5 x 0.5 inches (6.4 x 13 mm); Weight: 3.5 oz (10 g); Material: Carbide