1. Finger tightening or loosening is the most efficient method of turning nuts and bolts. The Uni-Grip raised ridges provide up to 300% more torque enabling easier and faster tightening or loosening in almost all work applications. The raised ridges prevent Uni-Grip sockets from rolling off the work table or surface and reduce the common and time-consuming frustration of having to retrieve dropped or lost tools. Large size markings around the outer surface of the base are highly visible for quick access and storage. Drive sizes can easily be identified by the pattern of the raised ridges.
2. 2 ridges=1/4"drive; 3 ridges=3/8"drive; 4 ridges=1/2" drive.
1. Quality standards: Uni-Grip sockets exceed ANSI and DIN standards. 2. Patents: USA, Germany, Japan, Taiwan, and China. 3. Available sizes: 1/4" drive, 3/8" drive, 1/2" drive.