Irwin 10235 Unibit Step Drill Bit Set 10 Hole

Product Description

The IRWIN 10235 is a Unibit step drill bit set designed for drilling clean, precise holes in sheet metal, plastic, conduit, and other thin materials. The set covers a range of 1/4 inches to 1-3/8 inches in 1/8 inches increments across 10 hole sizes, all accessible from a single bit. The 1/2 inches shank is compatible with standard drill chucks. Electricians, HVAC technicians, and plumbers rely on step drill bits for quick, burr-minimizing hole creation without needing multiple standard bits or a knockout set for every diameter.

This step drill bit set is suited for light-gauge sheet metal fabrication, electrical panel and enclosure work, conduit entry points, junction boxes, and plastic panels. It handles the range of hole sizes commonly needed when roughing in or servicing residential and light commercial systems. The single-bit design reduces tool changeovers on the job and works in standard corded or cordless drills with a 1/2 inches or larger chuck.

Key Features

• 10 hole sizes ranging from 1/4 inches to 1-3/8 inches in a single step bit
• 1/8 inches incremental steps for precise hole sizing without bit changes
• 1/2 inches shank fits standard 1/2 inches and larger drill chucks
• Unibit design minimizes burring on sheet metal, plastic, and thin-wall conduit
• Single-bit format reduces the need to carry multiple standard twist drill bits

Compatibility

Designed as an OEM-style replacement and general-use step drill bit for trade professionals working with sheet metal, electrical enclosures, and thin-wall materials requiring holes from 1/4 inches to 1-3/8 inches in diameter.

Installation Notes

Install in a 1/2 inches or larger drill chuck before use. Always disconnect power and de-energize any panel or enclosure before drilling into electrical equipment. Eye protection and work gloves are recommended when drilling metal. Center-punch the work surface before starting the bit to prevent walking on smooth sheet metal.

Technical Specifications

• Hole Size Range: 1/4 inches to 1-3/8 inches
• Step Increment: 1/8 inches
• Number of Hole Sizes: 10
• Shank Size: 1/2 inches
• Weight: 0.44 pounds
• Unit of Measure: Each
• UPC: 038548101057

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 10235