Irwin IR10310 Step Drill Bit 10-1/2 Inches

Product Description

The IRWIN IR10310 is a step drill bit designed to drill a single hole through sheet metal, plastic, wood, and thin-gauge materials in one pass. Step drill bits use a conical, multi-diameter profile to progressively enlarge a hole without requiring bit changes, making them a common choice for electricians, HVAC techs, and plumbers who need clean, burr-minimized holes in panels, enclosures, and junction boxes. At 10-1/2 inches in the standard configuration with a single hole profile, the IR10310 suits applications where a specific finished hole diameter is needed in a single drilling operation.

This step drill bit is suited for residential and light commercial trade work. Typical applications include drilling knockouts in electrical panels and enclosures, creating pipe and conduit penetrations in sheet metal ductwork, and opening holes in plastic junction boxes. Electricians and HVAC technicians are the primary installers. It is sold as a single unit.

Key Features

• Step profile drills a finished hole in a single pass without bit changes
• 10-1/2 inch standard size for precise hole sizing
• Single-hole design optimized for consistent diameter output
• Compatible with standard drill chucks used in trade applications
• Suitable for sheet metal, plastic, and thin-gauge panel materials

Compatibility

Designed as an OEM-style replacement and standard-use step drill bit for trade applications requiring a 10-1/2 inch standard hole in sheet metal, plastic, or similar thin-gauge materials.

Installation Notes

Installation should be performed by a qualified electrician, HVAC technician, or plumber as appropriate to the application. Secure the workpiece firmly before drilling to prevent movement and ensure a clean hole. Use appropriate personal protective equipment including eye protection when operating drill bits. Follow applicable NEC or local code requirements when creating penetrations in electrical enclosures or ductwork.

Technical Specifications

• Size: 10-1/2 inches standard
• Number of Holes: 1
• UPC: 038548103105
• Unit of Measure: Each
• Minimum Order Quantity: 1

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR10310