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The WILLIAMS TOOLS BAH3811152 is a 7/16-inch hex arbor designed to connect hole saws to standard drill drivers and drill presses. It accepts hole saws ranging from 32 millimeters to 152 millimeters (approximately 1-1/4 inches to 6 inches), covering the full range of common trade applications. The arbor is built to industrial standards, making it a practical accessory for electricians, plumbers, HVAC technicians, and general contractors who regularly cut through wood, drywall, metal, and similar materials. Its hex shank provides positive engagement with bit holders and reduces slipping under load.
This arbor is suited for both residential and light commercial work where a range of hole saw sizes must be driven from a single tool. It fits the industrial box packaging format for trade supply, sold individually. Typical applications include electrical rough-in, plumbing penetrations, HVAC duct and panel work, and general construction boring tasks requiring clean, consistent circular cuts across multiple hole saw diameters.
Fits hole saws ranging from 1-1/4 inches to 6 inches (32mm to 152mm) as stated by the manufacturer. Designed as an OEM-style replacement or add-on arbor for standard hex-shank hole saw systems.
Installation is performed by trade professionals or experienced users familiar with rotary cutting tools. Ensure the drill or drill press is powered off and unplugged before attaching or removing the arbor. Thread the hole saw securely onto the arbor and confirm the pilot bit is properly seated before beginning any cut. Follow applicable jobsite safety codes and wear appropriate eye and hand protection when operating hole saws.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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