Big Horn 19249 High Speed Steel Step Drill Bit Titanium Nitride Coated. Speed up kitchen and bath fixture installations with this high-speed steel step drill. This 3 piece set of titanium nitride coated, high speed steel step drill bits replaces 28 individual drill bits so you save time on switching out drill bits.

Features:

• Titanium nitride coating runs cooler and lasts longer
• Quick-change 1/4" hex shank
• Automatically deburrs holes
• Two-flute design for faster, smoother drilling
• Perfect for cutting stepped holes in steel, brass, plastic, and wood
• Self centering split point makes it easy to get the hole started
• Made from high grade, high speed, heated treated and tempered steel
• Ideal for thin metal, e.g steel, aluminium, copper, fibreglass, etc.

Specifications:

• Shank: 1/4" (Quick Change)
• 6 Step Bit- (3/16 in. to 1/2 in.):  3/16 in., 1/4 in., 5/16 in., 3/8 in.,7/16 in., 1/2 in.
• 9 Step Bit- (1/4 in. to 3/4 in.): 1/4 in., 5/16 in., 3/8 in., 7/16 in.,1/2 in., 9/16 in.,5/8 in.,11/16 in.,3/4 in.
• 13 Step Bit- (1/8 in. to 1/2 in.): 1/8 in., 5/32 in., 3/16 in., 7/32 in., 1/4 in., 9/32 in., 5/16 in., 11/32 in., 3/8 in., 13/32 in., 7/16 in., 15/32 in., 1/2 in.