Right angle, laser heat treated teeth grip better and last longer. Undercut tongue and groove design won't slip. V-jaws give you more points of contact on round stock and tubing. Patented reinforcing edge minimizes stress breakage. PermaLock fastener eliminates nut and bolt failure CHANNELLOCK uses high carbon C1080 steel for superior performance on the job, and an electric coating for ultimate rust prevention. There was no sacrifice made, these have comfort and durability needed to last! CHANNELLOCK BLUE grips for comfort.