Description

Irwin® Unibit® Step Drill Bit, Imperial, #4 Letter/Wire, 3/16 in Diameter Minimum Hole, 7/8 in Diameter Maximum Hole, 3-1/4 in Overall Length, 12 Steps, 1/16 in Step Depth, 12 Hole, 1 Flutes, Radial Concave Flute, 3/8 in Shank, Hex Shank, SpeedPoint® Point, M35 Cobalt HSS Cutting Edge, M35 Cobalt HSS, Steam Oxide, Applicable Materials: Stainless Steel and Steel

Features:

• 6X longer life
• SpeedPoint® tip for fast starts
• Geometry of single flute cutting edge drills true, round holes and provides maximum step control
• Laser etched sizes inside flute for easy and permanent hole size identification
• Hex-shaped shank secures easily

Warranty:

Lifetime

Applicable Materials	Stainless Steel and Steel
Cutting Edge Material	M35 Cobalt HSS
Finish	Steam Oxide
Flute Type	Radial Concave
Letter/Wire Size	#4
Material	M35 Cobalt HSS
Maximum Hole Diameter	7/8 in
Minimum Hole Diameter	3/16 in
Number of Flutes	1
Number of Hole Sizes	12
Number of Steps	12
Overall Length	3-1/4 in
Point Type	SpeedPoint®
Shank Size	3/8 in
Shank Type	Hex
Step Depth	1/16 in
Manufacturer	IRWIN INDUSTRIAL TOOL COMPANY