Allstar Performance Step Drill Set
1/4" Hex Shank
3 Piece Set
Titanium nitride coated high speed steel
Drill Multiple size holes with one bit
Drill sheet metal and aluminum without deforming or distorting
Bits start on contact, deburr and chamfer while drilling and does not require a center punch
Six Step: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
Nine Step: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
Thirteen Step: 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"