Diablo Drill Extension DHS500XT6 5-1/2 Inch (7/16 Inch Hex Quick Change 3000 RPM Steel Shaft Hole Saw Mandrel Reach Extension)

Diablo DHS500XT6 5-1/2-Inch Quick-Change 7/16-Inch Hex Extension Shaft

The Diablo DHS500XT6 5-1/2-Inch Quick-Change 7/16-Inch Hex Extension Shaft is an industrial drive extension accessory engineered to extend the reach of hole saws and large drill bits into deep wall cavities, ceiling joist bays, and tight framing gaps. Built with a 7/16-inch power hex shank rated for speeds up to 3,000 RPM and a tool-free quick-release receiver collar, this solid steel drive shaft connects directly to 1/2-inch drill chucks and Diablo Snap-Lock Plus mandrels. Designed for electricians, plumbers, and HVAC installers, this 5.5-inch extension solves reach limitations, chuck wobbling, and slow accessory changeovers during deep-pocket hole cutting operations.

Best Used For:

• Deep Wall & Joist Hole Saw Boring: Extending hole saw mandrels through double 2x top plates and deep floor joist cavities for pipe or conduit routing.
• HVAC & Ductwork Overhead Pass-Throughs: Reaching past structural obstructions, ceiling framing, and soffits to bore clean utility pass-through holes.
• High-Speed Quick-Change Hole Cutting: Swapping hole saw cups rapidly without chucking out the primary drive mandrel assembly.

Key Performance & Safety Features

• Tool-Free Quick-Change Receiver Collar: Enables rapid, tool-free attachment and release of Snap-Lock Plus mandrels and 7/16-inch hex power bits.
• 5-1/2-Inch Extended Drive Reach: Adds 5.5 inches of continuous length to navigate deep structural recesses without chuck binding.
• 7/16-Inch Power Hex Drive Shank: Heavy-duty hex shank prevents rotational slippage inside 1/2-inch drill chucks under high torque loads.
• 3,000 RPM Maximum Speed Rating: Engineered to maintain balanced concentricity and low rotational vibration at high drilling speeds.
• Heat-Treated Solid Steel Construction: High-tensile steel core body absorbs operational torsional shock when boring through dense framing lumber.

What's Included

• (1) Diablo DHS500XT6 5-1/2 in. Quick-Change 7/16 in. Hex Extension Shaft

Technical Specifications

Pro-Tip: Pull back the knurled quick-change collar completely before inserting your Snap-Lock Plus mandrel to ensure the internal detent ball locks fully into the drive groove.