Features:
The step drill bits are made of high quality high speed steel which with titanium coating, durable, anti-corrosion, sharp enough.
Two-flute design provides smoother, faster, accurate cutting.
Sharp enough to drill through wood, plastic, sheet metal.
Quick change 1/4" (6.35mm) hex shank, which can be easily fit into power driver, drill and press drill.

Specification:Package includes: 3 x Step Drill Bit Set
Size:
Bit #1 (6 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2";
Bit #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";
Bit #3 (9 steps): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4".

After-sale service: --The step drill bits' quality is guaranteed, if you received the broken one or our product don't meet your need, just feel free to let we know, we provide free exchange service.