Klein Tools K44 5/16-Inch Slotted Screw Holding Screwdriver

The K44 uses a split blade. The two halves of the tip wedge apart inside the screw slot and grip it, so you can start and drive a slotted screw one-handed in a panel or box where you can't get a finger on the head. There is no magnet involved, so it works on brass, stainless, and aluminum screws just as well as steel.

No. The K44 is not insulated and will not protect against electrical shock. Don't put it on energized terminals. If you're working live, you need a 1000V rated insulated driver instead, not this one.

No. It's a starting tool. The split blade is made to hold and start a screw, not to tighten it, and Klein specifically says it isn't designed for torquing or tightening. Set the screw with the K44, then switch to a standard solid-blade slotted driver to run it home. Prying and chiseling are also out.

Overall it's 8.25 inches (21 cm) with a 4 inch (10.2 cm) round shank. That gives you about four inches of reach past the handle, which covers most panel and junction box work but won't get to the bottom of a deep gutter or a recessed can. The round shank also means you can't put a wrench on it for extra leverage.

A magnetic driver only works on ferrous screws and loses its grip the moment the screw tips off axis. The K44's split blade physically wedges into the slot, so it holds brass and stainless hardware and keeps the screw square when you're reaching overhead or into the back of a box. The tradeoff is that it only does slotted heads, only in 5/16 inch on this model, and you finish the drive with a regular screwdriver.

Steel blade with a red plastic handle, and it weighs 4 oz (113 g). Klein lists it as made in the USA. Light enough to live in a pouch without thinking about it.

Klein Tools K44. That's the manufacturer part number and there's only one configuration, so there's no tip size, length, or handle option to specify.