Includes:
• (1) 3/16"-7/8" Bit
• (1) 1/8"-1/2" Bit
• (1) 3/16"-7/8" Bit

Features: 
• DRILL THROUGH A VARIETY OF MATERIALS Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
• VERSATILE DESIGN FOR PRECISE HOLES For drilling holes from 1/8-in to 7/8-in in diameter (3.2mm to 22.2mm). #1 has 13 steps 1/8-in to 1/2-in (3.2mm to 12.7mm) #4 has 12 steps 3/16-in to 7/8-in (4.7mm to 22.2mm)
• REDUCED SLIPPING Shank design helps to prevents slipping in drill chuck
• FASTER DRILLING #4 double-flute IRWIN Unibit only versus #4 single-flute IRWIN Unibit, average of first 10 holes in 1008 Steel

Specifications:
• Material: High Speed Steel
• Shank Type: 3-flat
• Number of Hole Sizes: 12