Patented undercut tongue and groove design assures, no slip jaw action. Patented reinforcing edge minimizes stress breakage. Patented Permalink fastener eliminates nut and bolt failures. Distinctive Channel lock blue comfort grips. Smooth jaws for non-marring surfaces 10" tongue and groove smooth jaw pliers. Channel lock uses high carbon C1080 steel for superior performance on the job, and an electronic coating for ultimate rust prevention. This has a unique design, with the right angle teeth grip in all directions for maximum bite and minimum wear. Also features the smooth jaw for use on plated fixtures. There's no sacrifice here, you have the durability and the comfort!.