Step drill bit spiral flute titanium coating

Bit diameter (mm) Overall length (mm) Working length (mm) Per pkg. Part No.
1/4″Hex(NZ)
4 – 12 65 45 1 D-46470
4 – 20 75 53 1 D-46486
Straight shank (Three flat)
4 – 32 102 80 1 D-40191