The Channellock 420 is a 9.5-inch straight-jaw tongue-and-groove plier with a 1.5-inch jaw capacity — slightly smaller than the 10-inch 430 but with the same forged construction and adjustment design. The undercut tongue-and-groove locks through its adjustment positions so the jaws don’t slide to the next setting when you crank down on a fitting at an angle.
It’s sized for plumbers, maintenance techs, and DIYers who want a medium-length tongue-and-groove for drain work, supply lines, and household fittings without the reach of a full 12-inch pair. The PermaLock fastener eliminates the loose-pivot failure that plagues nut-and-bolt designs, and the forged steel body resists springing under load the way cast-construction pliers do.
Channellock has been forging pliers in Meadville, Pennsylvania since 1886 — the same small American factory, now five generations into the same family. The company is known for the blue-handled tongue-and-groove pliers that defined the category, and every tool in the core line is made in the USA from forged high-carbon American steel.
