Channellock

Channellock is a Meadville, Pennsylvania hand-tool company founded in 1886 (originally as the Champion Bolt Clipper Company). The brand is the inventor and namesake of the modern tongue-and-groove "Channellock" plier — the 1933 patent for the multi-position adjusting design that competitors now genericize as "channel-locks." Pliers are made in the USA from high-carbon C1080 steel, with laser heat-treated cutting and gripping surfaces and an electronic-coated finish for rust resistance. Two product lines anchor the catalog: the 430-series tongue-and-groove pliers (PermaLock fastener, undercut groove design that resists slipping) and the 369 round-nose linemen's pliers with XLT (Xtreme Leverage Technology) cutter geometry — Channellock's claim, supported by IMR test lab #200910200, is that the rivet placement reduces required cutting force versus comparable national brands. Both lines carry a Limited Lifetime Warranty and are widely cited in r/Tools and r/MechanicAdvice threads for decade-plus service life, making the brand a common upgrade target from big-box mid-tier pliers.