The Channellock Tongue and Groove GripLock Pliers (2-Piece) are fashioned with a special jaw design to accommodate many shapes and feature offset heads for exceptional leverage. Undercut tongue-and-groove fabrication allows these heavy-duty tools to perform without slipping, giving users the confidence to impart maximum torque and leverage aided by the comfort and control of the ubiquitous CHANNELLOCK BLUE grips. A patented PermaLock fastener eliminates bolt and nut failure in any adjustable jaw setting, supplying the utmost strength to loosen and tighten threaded hardware and facilitating other fastening and crimping tasks.