Irwin 373001 Hole Saw Mandrel 3/8 in Hex Shank

Product Description

The IRWIN 373001 is a hole saw mandrel designed to drive hole saws in rotary drilling applications across plumbing, electrical, and HVAC rough-in work. Featuring a 3/8 inch hex shank, it provides a secure, positive connection to standard drills and drill presses. The mandrel accepts hole saws ranging from 9/16 inch to 1-3/16 inch in diameter, covering the most common small-diameter cutting sizes used in trade installations. Weighing 0.39 pounds, it is a compact, lightweight tool accessory suited for repetitive use on job sites. Licensed tradespeople and experienced DIYers reach for this mandrel when switching between hole saw sizes without changing chuck setups.

This mandrel is well suited for residential and light commercial applications where consistent, repeatable hole cutting is required. Electricians use it when boring through studs and plates for conduit or cable runs. Plumbers rely on it for cutting through framing and subfloor material when routing pipe. HVAC technicians use it when making penetrations for refrigerant lines, drain lines, or low-voltage wiring. The 9/16 inch to 1-3/16 inch capacity range addresses the majority of small-bore penetration work encountered in standard trade rough-in scenarios.

Key Features

• 3/8 inch hex shank for positive engagement with standard drills and drill presses
• Accepts hole saws from 9/16 inch to 1-3/16 inch in diameter
• Lightweight at 0.39 pounds for reduced fatigue during extended use
• Compact mandrel design suited for tight framing cavities and confined work areas
• Compatible with the standard IRWIN hole saw system for quick bit changes

Compatibility

Designed for use with hole saws ranging from 9/16 inch to 1-3/16 inch in diameter. Fits drills and drill presses equipped with a standard chuck that accepts a 3/8 inch hex shank arbor.

Installation Notes

Installation of this mandrel is performed by tradespeople including electricians, plumbers, and HVAC technicians during rough-in phases. Ensure the drill or drill press is powered off and the trigger is locked out before attaching or removing the mandrel. Verify the hole saw is fully seated and secured on the mandrel arbor before beginning any cut. Follow applicable NEC, IPC, or IFGC penetration and firestopping requirements for any hole bored through rated assemblies.

Technical Specifications

• Shank Size: 3/8 inch hex
• Compatible Hole Saw Range: 9/16 inch to 1-3/16 inch diameter
• Weight: 0.39 pounds
• Unit of Measure: Each
• UPC: 024721016584

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 373001