End Mill for Composites - Square, 0.3125" (5/16), Material - Machining: Carbide, Harvey Tool, Mfr#: 921020-C4

0.3125" (5/16) Cutter DIA x 1.0000" (1) Length of Cut Carbide Diamond Cut End Mill, 10 RH Teeth, 12 LH Teeth, Amorphous Diamond Coated