Channellock 463 16-Inch Tongue and Groove Plier V Jaws give you more points of contact on round stock and tubing Right angle, laser heat-treated teeth grip better and last longer Undercut tongue & groove design won't slip PermaLock fastener eliminates nut and bolt failure Made in the USA Patented reinforcing edge minimizes stress breakage High-carbon C1080 steel for superior performance on the job and specially coated for ultimate rust prevention