The Channellock 337 is a 7-inch diagonal cutting plier — the standard side-cutter size carried by most electricians. The cutting edge is precision-ground for clean cuts on stranded and solid copper; the forged high-carbon steel body is balanced for reduced hand fatigue on repetitive cuts.
7 inches is the size most electricians reach for first — smaller than a 9-inch lineman’s plier, larger than a precision flush cutter — and handles 90% of residential and commercial wire work: stripping leads, trimming zip-tie ends, cutting 12- and 14-gauge romex, nipping the ends off pigtails. Balanced weight distribution over the handle reduces the wrist fatigue that comes from running diagonals all day on a commercial install — a cheap diagonal is front-heavy and tires the hand after 30 cuts. High-carbon steel is the material all serious diagonals are made of; it takes and holds an edge the way mild steel never will. The Channellock-blue comfort grips are dipped for a grip that works wet, oily, or gloved.
Aimed at electricians, low-voltage installers, automotive wiring techs, and home-project users who want one diagonal plier that covers the common wire gauges.
Per the Amazon listing, the 337 is Made in the United States with high carbon steel. Channellock has forged pliers in Meadville, Pennsylvania since 1886.
