– Small and handy multi-use multi-tool a 3/8 drive. – Designed to automatically adjust to any size or shape, suitable for standard 1/4 to 3/4 inches and metric 7mm to 19mm screws, nuts, and bolts. – Rounded design, compact and portable. – Self adjusting grip designed to unscrew most lug nuts, hex nut, wing nuts, broken nuts, stripped or damaged nuts, eye bolts, square nuts, hexes, etc. – Built with 54 professional grade individual hardened steel spring pins that retract to the shape of the head being fastened/unfastened. – Extender attachment is easy to connect with most electric drills, electric screwdrivers and manual ratchet wrenches. – NOT FOR USE with pneumatic and hammer tools