Irwin 10231 Unibit Step Drill Bit Set 13-step

Product Description

The IRWIN 10231 is a Unibit step drill bit set designed to drill multiple hole sizes with a single bit. The 13-step design covers a range from 1/8 inch up to 1/2 inch, eliminating the need to swap bits for common hole sizes encountered in sheet metal, electrical panels, and light-gauge materials. The stepped flute geometry self-centers on flat or curved surfaces without a pilot hole. This type of bit is a standard tool in electrical and HVAC rough-in work where knockout holes and conduit entry points are cut through thin metal enclosures.

Step drill bits are commonly used in residential and light commercial applications where technicians need to cut precise, burr-minimized holes through sheet metal, junction boxes, electrical panels, and HVAC cabinet walls. The 13-step configuration on this set reduces tool changes during a single job. Licensed electricians, HVAC technicians, and plumbers working with thin-gauge metal enclosures are the primary users of this bit set.

Key Features

• 13-step design covers 1/8 inch through 1/2 inch in a single bit
• Self-centering tip eliminates need for a pilot hole on flat or curved surfaces
• Suited for sheet metal, electrical knockouts, and HVAC cabinet penetrations
• Reduces tool changes when multiple hole sizes are needed on the same job
• Sold as each unit with a minimum order quantity of 5

Compatibility

Designed for use with standard drill drivers and drill presses accepting common shank sizes. Intended for use on thin sheet metal, light-gauge steel, aluminum, and similar materials typical of electrical and HVAC enclosures.

Installation Notes

Step drill bits are used by licensed electricians, HVAC technicians, and plumbers during rough-in or service work. Wear appropriate eye and hand protection when drilling metal. Secure the workpiece before drilling to prevent rotation. Do not use on materials thicker than the rated gauge range for step drill bits, as excessive heat and bit wear will result.

Technical Specifications

• Step Range: 1/8 inch to 1/2 inch
• Number of Steps: 13
• Weight: 0.81 pounds
• UPC: 038548101019
• Unit of Measure: Each
• Minimum Order Quantity: 5

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 10231