Klein Tools 1/2-Inch Nut Driver

No. The Klein 1/2-Inch nut driver is not insulated and will not protect against electrical shock, so it must not be used on energized conductors or terminals. De-energize and verify before using it. Eye protection is called for during use. If you need live-work capability, you need a separately rated insulated driver, not this one.

Two shaft lengths are offered: a 3-inch hollow shaft (part S16) and a 6-inch hollow shaft (part S166). Both take 1/2-inch hex nuts. The 3-inch is the standard length that covers most work and is easier in tight panel spaces; the 6-inch gives you more reach down into deep enclosures or recessed nuts. Both shafts are hollow, so either will slip over a long bolt or stud rather than bottoming out on it.

The handle uses internal flanges that anchor the shaft against twisting, so the shaft is keyed into the plastic rather than just pressed in. The shaft itself is chrome plated to resist corrosion, and the tool meets or exceeds the applicable ASME/ANSI specifications. It is made in the USA.

No, the shaft is not magnetized, so it will not retain a loose nut for one-handed starts. It is a hollow-shaft driver, which means the tradeoff works in your favor on long bolts and studs, stacked circuit board standoffs included: the shaft swallows the thread instead of stopping at the end of it.

By the handle color. The 1/2-inch size carries a red Comfordome handle, and Klein color-codes the handles across the set so you can pick the size out of a pouch by sight rather than reading the stamp. The handle is smooth and shaped to sit in the palm for turning torque.

About 0.2 lbs, with a 1 inch handle height and 1 inch width, so it rides in a pouch or a tool bag without adding noticeable bulk. Light enough for overhead panel work where you are holding the tool up for long stretches.