Irwin 10232 UniBit 3/16-Inch to 1/2-Inch 1/4-Inch Shank Step Drill Bit

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Hanson Step Drills save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. The single radial flute assures perfectly round holes. Use on steel brass aluminum and other thin materials. Step Drills are self-starting and will not slip.Drill diameters etched in flute for easy identification.

• 6 hole sizes


• Easy-to-sharpen non-skid tip


• Single-fluted cutting edge


• 3 flatted shank


• Full lifetime warranty

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Irwin Industrial Tools 10228 Unibit 228 Step Drill Bit Set 4-Piece

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Item #: VGP10228.

Features & Benefits:Includes:

• UN1- 1/8"-1/2" step drill
• UN1- 1/8"-1/2" step drill
• UN3- 1/4"-3/4" step drill
• UN1T- 1/8"-1/2" titanium step drill

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• Single-flute cutting edge for greater control through steps


• 3 Flatted shank prevents slipping in drill chuck


• Non-skid self-starting tip eliminates skidding and the need for center punching.


• Available in fractional and metric sizes


• Also available with titanium nitride coating for longer life

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Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit

Hanson Step Drills save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. The single radial flute assures perfectly round holes. Use on steel brass aluminum and other thin materials. Step Drills are self-starting and will not slip.Drill diameters etched in flute for easy identification.

• Step drill that produces true round holes


• Non-skid tip means no need for center punches


• 3 flatted shanks prevent drill chuck slipping


• Made from durable heat-treated molybdenum steel


• Full lifetime warranty

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