Irwin 10232 Unibit Step Drill Bit Set 6 Step

Product Description

The IRWIN 10232 is a Unibit step drill bit set designed for drilling clean, precise holes in sheet metal, plastic, and thin-gauge materials. The set includes bits that step through six hole sizes ranging from 3/16 inches to 1/2 inches, with a 3/8-inch shank for compatibility with standard drill chucks. Each step on the bit is precision-ground to produce accurate hole diameters without the need to change bits mid-task. Electricians, HVAC technicians, and sheet metal workers commonly use step drill bit sets for punching and sizing holes in electrical enclosures, ductwork, and junction boxes.

This set is suited for light- to medium-duty metalworking applications in both residential and commercial service environments. The step-drill format allows a single bit to replace multiple standard twist drill bits when working through thin materials, reducing setup time on service calls. Trade professionals will find this set useful for conduit knockout work, HVAC sheet metal penetrations, and general maintenance tasks where multiple hole sizes are required.

Key Features

• Six-step design covers hole sizes from 3/16 inches to 1/2 inches in a single bit
• 3/8-inch shank fits standard drill chucks without an adapter
• Step-drill geometry reduces walking and produces clean, burr-minimized holes in thin materials
• Eliminates the need to swap multiple bits when sizing different hole diameters
• Suited for sheet metal, plastic, and other thin-gauge materials common in trade service work

Compatibility

Designed as an OEM-style step drill bit set for use with standard 3/8-inch or larger drill chucks in corded and cordless drill drivers.

Installation Notes

Step drill bits are installed and serviced by electricians, HVAC technicians, and sheet metal workers. Always ensure the workpiece is secured with a clamp or vise before drilling to prevent spinning. Use appropriate cutting speed for the material being drilled — lower speeds are recommended for harder metals to extend bit life. Wear appropriate eye protection and gloves when working with metal and drilling operations.

Technical Specifications

• Step Range: 3/16 inches to 1/2 inches
• Number of Steps: 6
• Shank Size: 3/8 inches
• Weight: 0.813 pounds
• UPC: 038548101026

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 10232