Klein Tools 630-3/16M 3/16-Inch Magnetic Tip Nut Driver 3-Inch Shaft

No. The 630-3/16M is not insulated and will not protect against electrical shock. De-energize the circuit before using it, and wear approved eye protection. If you need to work on or near energized parts, you need a 1000V insulated driver instead, not this one.

The 630-3/16M has a 3 inch shaft and 6.75 inch overall length, so it is a short-reach driver meant for surface and shallow work, such as hex-head sheet metal screws on boxes, covers, and device straps. It is not hollow-shaft, so it will not run down over a long protruding stud or threaded rod. For recessed fasteners on a stud, look for a longer or hollow-shaft nut driver in the same 3/16 inch size.

SAE. The tip is 3/16 inch, an inch-series hex. The M in the part number 630-3/16M refers to the magnetic tip, not metric. If your fasteners are metric, this is the wrong driver.

Yes. The 630-3/16M uses a rare-earth magnetic tip, so a 3/16 inch hex head stays seated in the socket while you start it overhead or in a box you cannot get a second hand into. Handy for hex-head self-tappers on covers and straps.

Klein color codes the handle dome by size, and the 630-3/16M is black. That is the fastest way to grab the right size out of a pouch or roll without reading stamps.

The 630-3/16M anchors the shaft with internal flanges in the Cushion-Grip handle to resist twisting, and the shaft is chrome plated to fight corrosion. The cushion handle is what lets you put real torque on a stubborn fastener without chewing up your palm. It is a hand tool, though, not an impact or drill accessory.

Yes, the 630-3/16M magnetic tip nut driver is made in the USA, which matters on jobs carrying domestic-sourcing requirements for tooling.

It weighs 0.20 lbs and measures 6.75 inches by 1 inch by 1 inch, so it drops into a pouch or a bucket organizer slot without taking up a full-size screwdriver space.