Milwaukee 49-66-4537 Magnetic Nut Driver 1/2 Inch

Product Description

The MILWAUKEE 49-66-4537 is a 1/2-inch magnetic nut driver built for impact driver and drill driver use in heavy-duty trade applications. The driver is machined from heat-treated Custom Alloy 76 steel, which controls hardness across the shank and tip for extended service life under repeated impact loading. A dedicated Shock Zone in the shank absorbs peak torque to reduce tip breakage. The hex geometry is tightly toleranced for a snug fit on fastener heads, and a chamfered edge at the tip maximizes screw-head engagement and reduces cam-out. Overall length is 2-9/16 inches.

This nut driver is suited for residential and commercial construction, mechanical, and electrical trade work wherever 1/2-inch fasteners are driven at volume. It is designed specifically for use with impact drivers and drill drivers, making it a standard addition to an electrician, HVAC technician, or general contractor tool kit. The color-coded band on the shank allows fast size identification when multiple nut drivers are staged on a belt or in a pouch.

Key Features

• Heat-treated Custom Alloy 76 steel construction for controlled hardness and extended bit life
• Shock Zone geometry absorbs peak impact torque and reduces tip breakage
• Durable magnet holds fasteners securely during single-handed positioning and set-up
• Chamfered tip edge maximizes screw-head engagement and reduces stripping
• Improved hex geometry provides tight fit on 1/2-inch fastener heads
• Color-coded band for fast visual size identification

Compatibility

Designed for use with standard impact drivers and drill drivers accepting 1/4-inch hex shank accessories. Suitable for driving 1/2-inch hex-head fasteners across a wide range of trade applications.

Installation Notes

Install and remove nut drivers only when the tool is powered off and the battery is removed or the tool is unplugged. Seat the 1/4-inch hex shank fully into the tool chuck before driving to ensure secure engagement. This driver is rated for impact driver use; avoid applying lateral force or using it as a pry point, as this can damage the shank. Follow applicable jobsite safety codes when operating rotary tools overhead or in confined spaces.

Technical Specifications

• Drive Size: 1/2 inch
• Overall Length: 2-9/16 inches
• Shank Type: 1/4-inch hex, impact-ready
• Material: Heat-treated Custom Alloy 76 steel
• UPC: 045242266623

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 49-66-4537