This high quality high speed steel step drill bit set has a black and cobalt surface treatment that holds lubricant for a smoother and cleaner cut!! Each bit has two flutes which automatically deburr as you drill.
These step bits have a three flat shank so they do not spin when used in a keyless chuck.
Contents:
2 Step bits with 1/4" shanks:
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", 3/16"-1/2"
6 Steps:
3/16",1/4",5/16",3/8",7/16",1/2"
7 Step bits with 3/8" shanks:
9 Steps:
1/4",5/16",3/8",7/16",1/2",9/16",5/8",11/16",3/4", 3/16"-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"9/16"-1"
8 Steps:
9/16",5/8",11/16", 3/4",13/16",7/8",15/16",1", 13/16" to 1-3/8"
10 Steps:
13/16",7/8",15/16",1", 1-1/16", 1-1/8", 1-3/16",1-1/4", 1-5/16",1-3/8", 7/16"to 1-1/8"
12 Steps:
7/16",1/2",9/16,5/8",11/16",3/4",13/16",7/8", 15/16",1",1-1/16", 1-1/8", 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", 1/8" to 7/8"
13 Steps:
1/8", 3/16",1/4",5/16",3/8", 7/16",1/2", 9/16",5/8",11/16",3/4",13/16",7/8"
