Klein Tools 620-4 Coated 1/4-Inch Cabinet Screwdriver, 4-Inch Shank

No. The 620-4 is not insulated and will not protect against electrical shock, even though the shank carries a plastic coating. That coating is there for circuit protection only, meaning it reduces the chance of bridging adjacent terminals, not operator protection. If you need protection on energized work, you need a screwdriver rated and marked as insulated, not this one. Always wear approved eye protection when using it.

Cabinet tip means the flat blade is ground with parallel sides, so the tip is no wider than the shank. That lets it drop straight into a recessed or counterbored screw hole without the flared shoulders of a keystone tip catching on the surrounding material. Use the 620-4 for recessed screws, deep-set panel screws and terminal work in tight pockets. If you are driving large screws and want a thicker, stronger blade that can take more torque, a keystone tip is the better pick.

Reach is limited. The 620-4 has a 4 inch shank and an overall length of 8.344 inches (21.2 cm), which covers most device boxes, breaker lugs and cabinet work within arm's length of the opening. For terminals set deep behind a panel interior, you want a longer shank version of the coated cabinet screwdriver rather than this 4 inch one. The thin coating on the shank does help it pass through confined openings that a thicker-bodied driver will not clear.

The tip measures 1/4 inch (6.4 mm) across, which is the common size for breaker and receptacle terminal screws, panel cover screws and cabinet hardware screws. The tip is precision-machined so it beds in the slot rather than camming out. Pair the tip width to the slot length: a 1/4 inch tip in a smaller slot will chew the screw head.

No, it is not magnetic. Screws will not stay on the tip, so for overhead or blind starts you will need to hold the screw or use a magnetizer. The round shank also means there is no flat for a wrench, so all torque goes through the Cushion-Grip handle, which has internal flanges anchoring the blade against twisting.

No. The 620-4 is not to be used to pry or chisel. The blade is heat-treated steel sized for driving, and prying can snap it or bend the tip out of spec, which then wrecks screw heads. Use a pry bar or a scraper for those jobs and keep the driver for fasteners.

Made in USA, and it meets or exceeds applicable ASME / ANSI specifications for hand screwdrivers. For institutional and MRO buyers standardizing a tool crib on a domestic, spec-compliant line, that is the claim on record for the 620-4.

Klein's Tip-Ident marking on the end of the black handle shows the screwdriver type and the orientation of the tip, so you can identify a cabinet-tip flat blade and know which way the blade is turned before it clears the pouch. Useful when you are working one-handed on a ladder.

It weighs 3.2 oz (91 g), light enough to live in a pouch all day. The shank coating is a special plastic that resists cutting, cracking and chipping, and the blade underneath is chrome-plated for corrosion resistance, so bag abrasion and damp conditions are not an issue.