Description

Irwin® Unibit® Step Drill Bit, Imperial, #3 Letter/Wire, 1/4 in Diameter Minimum Hole, 3/4 in Diameter Maximum Hole, 2-3/4 in Overall Length, 9 Steps, 1/16 in Step Depth, 9 Hole, 1 Flutes, 1/2 in, 1/4 in, 11/16 in, 3/4 in, 3/8 in, 5/16 in, 5/8 in, 7/16 in, 9/16 in, Radial Concave Flute, 3/8 in Shank, Hex Shank, SpeedPoint® Point, M35 Cobalt HSS Cutting Edge, M35 HSS-Co 5, Bright/Steam Oxide, Applicable Materials: Steel and Stainless Steel

Features:

• 6X longer life
• Laser etched sizes inside flute for easy and permanent hole size identification
• Engineered with m35 cobalt steel for maximum life when drilling in tough steel
• Geometry of single flute cutting edge drills true, round holes and provides maximum step control
• Laser marked size
• SpeedPoint® tip for fast starts

Applicable Materials	Steel and Stainless Steel
Cutting Edge Material	M35 Cobalt HSS
Finish	Bright/Steam Oxide
Flute Type	Radial Concave
Hole Sizes Cut	1/2 in, 1/4 in, 11/16 in, 3/4 in, 3/8 in, 5/16 in, 5/8 in, 7/16 in, 9/16 in
Letter/Wire Size	#3
Material	M35 HSS-Co 5
Maximum Hole Diameter	3/4 in
Minimum Hole Diameter	1/4 in
Number of Flutes	1
Number of Hole Sizes	9
Number of Steps	9
Overall Length	2-3/4 in
Point Type	SpeedPoint®
Shank Size	3/8 in
Shank Type	Hex
Manufacturer	IRWIN INDUSTRIAL TOOL COMPANY