Facom HSS Step Drill Bit 4mm x 39mm

For precision-drilling straight bores in all materials.
No pilot hole required.
Cross-sharpening: self-centering.
More aggressive cut for easier drilling and no burs.
Better shaving removal.
Less vibration, quieter operation.
Parallel shank with 3 flats for positive rotation.
Laser-engraved diameter marking in a groove.
678006: Special ISO gland.
678014: PG size step drill.