Spiral Variable Multi Step Down Drill Bit Unibit Tool Uni Stepped Colbalt Set
- Cobalt steel bits provide longer life and cut faster than high speed steel
- Two spiral flutes, automatically will de-burr the edge as you drill and provides better chip removal
- Tri-flat shank for sure grip
- 135 degree split point, self centering
- Case included
- Set Contains:
- 1/4″ shank:
- 3/16″ to 1/2″
- 6 steps (3/16″, 1/4″, 5/16″, 3/8″. 7/16″, 1/2″)
- 1/8″ to 1/2″
- 13 steps (1/8″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 13/32″, 3/8″, 13/32″, 7/16″, 15/32″, 1/2″)
- 3/8″ shank:
- 1/4″ to 3/4″
- 9 steps (1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″)
- 1/4″ to 1-3/8″
- 10 steps (1/4″, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″)
- 3/16″ to 7/8″
- 12 steps (3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″)
