Plastic, laminated thermosetting type two grade le, spec l-p-509; 0.530 in. Lg; cone angle 30 deg; 0.100 in. Angle lg; 0.520 in. Shaft dia; 0.250 in. Shaft lg; 0.378 in. Diameter hole drilled in cone end; 0.2495 in. Diameter hole drilled in shaft end