1/8 4 flute , M42 Square Double End, Center Cut, 3/16 Shank, 3/16 LOC x 2 OAL
1/8 4 flute , M42 Square Double End, Center Cut, 3/16 Shank, 3/4 LOC x 3-1/8 OAL
1/8 4 flute , M42 Square Double End, Center Cut, 3/16 Shank, 3/8 LOC x 2-1/4 OAL