Klein Tools Magnetic Hollow Color-Coded Power Nut Drivers Set, 6 Pieces (32940-KLE)

Key Features
Hollow for Threaded Rod
A 3-3/4 in. hollow core lets these power nut drivers run nuts down threaded rod and long bolts.
Impact Rated
Built for impact drivers, with a durable finish for corrosion protection.
Color-Coded Sizes
Each hex size is color coded, so you grab the right driver from the case without reading stamps.
Overview
The Klein Tools 32940 Magnetic Hollow Color-Coded Power Nut Drivers Set, 6-Piece is a set of 1/4 in. hex-shank power nut drivers for electricians, HVAC installers, mechanical contractors and strut installers. This is a power nut driver set designed for driving hex nuts and bolts with a drill or impact driver, including nuts on threaded rod. Model Number: 32940.
The set covers six SAE hex sizes: 1/4, 5/16, 3/8, 7/16, 1/2 and 9/16 in. Each has a 5 in. shaft for extended reach into panels, ceilings and equipment.
The 3-3/4 in. hollow core is the key feature. It lets a nut travel down threaded rod or a long bolt without bottoming out, which is exactly what hanger rod, strut and unistrut work needs.
Rare-earth magnets hold fasteners for one-handed driving, and the magnet size increases with each hex size to match the fastener. The drivers are impact rated and finished for corrosion protection. Overall length is 6.3 in. Not insulated.
Buy it if you hang threaded rod or run nuts on long studs and are tired of drivers that bottom out.
Runs Nuts Down Threaded Rod
The deep hollow shaft clears threaded rod, so nuts run all the way home.
3-3/4 in. hollow core
5 in. shaft for extended reach
Magnets Sized to the Fastener
Rare-earth magnets keep nuts in the socket when you are working overhead.
Magnet size increases with hex size
One-handed starting
Built for Impact Drivers
Impact-rated steel and a corrosion-resistant finish stand up to daily driving.
1/4 in. hex drive
Color-coded sizes
What's in the Box
(1) 1/4 in. power nut driver
(1) 5/16 in. power nut driver
(1) 3/8 in. power nut driver
(1) 7/16 in. power nut driver
(1) 1/2 in. power nut driver
(1) 9/16 in. power nut driver
Key Specifications
Tool Type
Hollow power nut driver set
Piece Count
6
Hex Sizes
1/4, 5/16, 3/8, 7/16, 1/2, 9/16 in. (SAE)
Drive
1/4 in. hex
Shaft Length
5 in.
Hollow Depth
3-3/4 in.
Overall Length
6.3 in.
Magnetic
Yes, rare-earth
Yes
Insulated
No
Material
Steel alloy
Weight
1.0 lbs
Compatibility
Bit Interface
1/4 in. hex shank fits standard drill chucks, impact drivers and quick-change holders.
Built For
ElectricalHVACStrut and Threaded RodMechanical ContractingGeneral Contracting
Tool Nut's Take
The Threaded Rod Answer
The Klein Tools 32940 set solves the bottoming-out problem every rod installer knows.
Who it's for: Electricians, HVAC and mechanical installers hanging rod and strut.
Why it stands out: Deep 3-3/4 in. hollow core, impact rating and size-matched magnets.
Worth knowing: SAE sizes only, and not insulated.