The Klein Tools 85664 is a 4-piece square recess screwdriver set purpose-built for electricians working on combination head receptacles, switches, and panel screws. Square recess (Robertson) drive is the go-to fastener type on Canadian job sites — and having a dedicated, colour-coded set means you'll always grab the right size on the first reach. Each tip is precision-machined for an exact fit that minimises cam-out and protects fastener heads, while the Cushion-Grip™ handles deliver the torque and comfort needed for repetitive driving throughout a full work day. Covering sizes #0 through #3 (models 660, 661, 662, and 663), this set handles the full range of square drive fasteners found in residential and commercial electrical work.

Specifications