Part number, #9-4XK52
Step Drill Bit
IRWIN
Cobalt, Black Oxide
Drills holes, 7/8" to 1-1/8"
2 Hole Sizes
Shank Type: Straight with Three Flats
Shank Size: 3/8"
Overall length: 2-7/8"
FOR:
Aluminum, Brass, Copper, Laminate, Steel, Plastic, Stainless Steel, Hardened Steel, Wood
Speedpoint
Starts fast!!
Hole sizes:
7/8" to 1-1/8"
Shank Type: Straight with Three Flats
Shank Diameter: 3/8"
The shanks on these step drill bits have three flats that help prevent the bits from slipping in the drill chuck during drilling.
These cone-shaped bits have steps of increasing diameter marked along their cutting head.
As each bit is pushed into a piece of sheet metal or other thin material, each step on the bit widens the hole.
The bits also have a self-starting split point that prevents the bits from moving, or walking, when starting to drill, which eliminates the need for using a center drill to create a starter hole before drilling.