Milwaukee 49-66-4543 2-in-1 Magnetic Nut Driver 5/16 3/8 in 3pc

Product Description

The MILWAUKEE ELECTRIC TOOL CORP 49-66-4543 is a SHOCKWAVE Impact Duty QUIK-CLEAR 2-in-1 Magnetic Nut Driver set sold in a 3-piece pack. Each driver combines two nut driver sizes — 5/16 inch and 3/8 inch — on a single shank, reducing the need to swap tools mid-task. The QUIK-CLEAR mechanism lets the user clear metal shavings from the magnet quickly, preventing fastener head stripping during drive. Built from heat-treated CUSTOM ALLOY76 steel, the drivers are engineered for controlled hardness and extended service life. The integrated SHOCK ZONE geometry absorbs peak torque to reduce bit breakage under impact load.

These nut drivers are designed for licensed electricians, HVAC technicians, plumbers, and other trade professionals who regularly drive hex head screws with impact drivers or drill drivers. The 2-in-1 shank configuration is particularly useful in panel work, equipment installation, and conduit fitting where both 5/16 inch and 3/8 inch hex fasteners appear in the same task. The set of three provides backup units for crew use or multi-bag staging. Color-coded rings on each driver allow fast size identification without stopping to read markings.

Key Features

• 2-in-1 shank delivers both 5/16 inch and 3/8 inch nut driver sizes on a single bit
• QUIK-CLEAR magnet cleaning mechanism removes metal shavings to prevent fastener head stripping
• Impact Duty magnet resists loosening over time for consistent fastener engagement
• SHOCK ZONE design absorbs peak torque and reduces bit breakage under impact
• Heat-treated CUSTOM ALLOY76 steel construction for controlled hardness and extended bit life
• Color-coded size identification rings for fast visual differentiation in the field

Compatibility

Designed for use with impact drivers and drill drivers that accept standard 1/4 inch hex shank accessories. Suitable for driving 5/16 inch and 3/8 inch hex head screws and fasteners across trade applications.

Installation Notes

Insert the appropriate end of the 2-in-1 shank into a 1/4 inch hex chuck before operation. Engage the QUIK-CLEAR mechanism periodically during use to clear accumulated metal shavings from the magnet, especially when working with self-drilling or sheet metal screws. Follow tool manufacturer torque and speed recommendations when pairing with impact drivers to avoid overdriving fasteners. No disassembly of the driver is required for routine magnet cleaning.

Technical Specifications

• Nut Driver Sizes: 5/16 inch and 3/8 inch
• Shank Type: 2-in-1 single shank
• Material: Heat-treated CUSTOM ALLOY76 steel
• Weight: 0.2 pounds
• Package Quantity: 3 pieces
• Unit of Measure: EA

Standard Information

• Brand: MILWAUKEE ELECTRIC TOOL CORP
• Manufacturer Part Number: 49-66-4543