Klein Tools 665 #1 Square Screwdriver 11 3/4 in

Square-Recess Screwdriver for General Use

The Klein Tools 665 is a #1 square-recess screwdriver built for general-purpose fastening tasks. Its 11 3/4 in overall length provides reach for common automotive and household applications. The tool is sold individually as a new hand tool. Professionals and DIY users needing a dedicated square-drive bit will find it suited to routine assembly and maintenance work.

Corrosion-Resistant Chrome Shank

The shank features a chrome coating that resists corrosion during storage and daily use. No cushion grip, insulation, magnetic tip, ESD-safe rating, non-sparking property or specialised tip finish is included. These omissions mean the driver is intended for standard mechanical fastening rather than electrical, hazardous-environment or precision-electronics work. The bare-metal shank and simple handle keep the focus on basic torque delivery.

Fixed-Blade Build with Single Tip Size

The one-piece construction eliminates moving parts, so the tool withstands repeated torque cycles without loosening. Because the tip is a fixed #1 square recess, the driver cannot adapt to other drive types or sizes; users needing Phillips, slotted or different square sizes must carry additional tools. The 11 3/4 in length fits most tool pouches and drawers, while the lack of insulation or non-sparking rating limits use around live circuits or flammable atmospheres.