CHANNELLOCK SPEEDGRIP 428X Tongue & Groove Pliers make fast and easy non-slip adjustments so you can get the job done even quicker. Laser-hardened crosshatch teeth grip stronger and last longer thanks to innovative engineering. There is also a reaming feature for easy deburring of pipe. Finally, like all CHANNELLOCK pliers, SPEEDGRIP 428X Tongue & Groove Pliers are made in the USA from high carbon U.S. steel for ultimate strength and have comfort handles with no-slip grips. US Patent No. 12,280,481