Klein Tools 635-6 Nut Driver Set, Magnetic Nut Drivers, Heavy Duty, 6-Piece

Six drivers: 1/4, 5/16, 3/8, 7/16, 1/2 and 9/16 inch hex. Each handle is color coded so you can grab the right size out of the pouch without reading the stamp. That range covers the common hex-head sheet metal screws and machine nuts an electrician hits on panel covers, strut, and device boxes.

Yes. The 635-6 drivers use a through-handle, full-hollow shaft, so threaded rod passes straight through the handle instead of bottoming out. That means you can torque a hex nut onto rod of any length, which is what makes them useful for hanging strut, all-thread rod, and conduit supports. A standard solid-shaft nut driver stops as soon as the rod hits the bottom of the socket.

No. The 635-6 set is not insulated and will not protect against electrical shock. Do not treat these as 1000V tools. If you need to work energized, you need a VDE/1000V rated insulated nut driver instead. Eye protection is called for whenever you use them.

Shaft length is 4 inches (10.2 cm) on each driver, with overall length running 9.125 to 9.6875 inches (23.2 to 24.6 cm) depending on the size. The 4 inch shaft handles most panel and box work; for a recessed nut sitting deeper than that on a stud, the hollow shaft still lets the stud pass up into the handle rather than limiting you.

That's what the rare-earth magnetic tip is for. It holds the nut in the socket while you start it, so you can reach into a panel or work above your head without dropping hardware into the enclosure. It's a magnet, not a retainer clip, so a heavy 9/16 nut on a hard jolt can still come loose.

Yes. The 635-6 drivers have a wrench assist on the handle, so you can put an open-end wrench on it and break loose or final-torque a stubborn nut without twisting the grip off. Klein rates the heavy duty handles and shafts above their regular nut drivers for torque. The grip itself is cushion grip for the normal hand-driving.

For a maintenance cart doing de-energized mechanical work, panel covers, strut, rod hangers, and equipment fastening, the 635-6 covers 1/4 through 9/16 inch in one six-piece set with hollow shafts, which is the feature that matters most for all-thread. Where it is the wrong call is any energized task, since it carries no insulation rating. Facilities that need one set to serve both should buy an insulated set for live work and keep these for everything else.

No. The 635-6 pieces are fixed-handle hand nut drivers with cushion grips, not 1/4 inch hex shank bits, so there is nothing to chuck into a drill or impact. If you want powered driving, you need magnetic nut setters with a hex shank. These are for hand driving with the option of a wrench on the handle for extra torque.

The set weighs 40 oz (1134 g), about 2.5 lbs as shipped, and measures 13.275 x 7.425 x 1.575 inches. Flat enough to lie in a van drawer or the bottom of a bucket bag rather than standing up in a pouch.