Package comes with five durable step drill bit. Sizes with 1/4" Shank: 3/16" - 1/2" 6 steps; 1/4" - 3/4" 9 steps. 3/8" Shank: 1/8" - 1/2" 13 steps; 1/4" - 1-3/8" 10 steps; 3/16" - 7/8" 12 steps. 5 piece Neiko SAE Bit Step. Carry aluminum case Two flutes- automatically deburrs as you drill Tri-flat shank provides a sure grip 1/4" Shank: 3/16" to 1/2" 6 steps (3/16 1/4 5/16 3/8 7/16 1/2") 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") 3/8" Shank: 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 7/16 15/32 1/2") 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")
- Package comes with five durable step drill bit made with high speed steel
- Two flutes design automatically deburrs as you drill
- Tri-flat shank design for sure grip
- Set complete with an aluminum storage case
- Two popular shank sizes included - 1/4-inch and 3/8-inch shank