3/8 4 flute , M42 Square Single End, Center Cut, 3/8 Shank, 1-1/2 LOC x 3-1/4 OAL
3/8 4 flute , M42 Square Single End, Center Cut, 3/8 Shank, 3/8 LOC x 2-1/8 OAL
3/8 4 flute , M42 Square Single End, CH.020, 3/8 Shank, 3/4 LOC x 2-1/2 OAL