Lightweight cast aluminum handle creates less arm stressHardened teeth are ideal for most hard pipes, bolts and couplingsHammer head design provides flat surface for hammering40 percent less weight compared to iron wrenchesMade in the USAMartin's 18" aluminum pipe wrench is made to be heavy duty. It's I-beam handle is for proven strength and durability without excess weight. The full floating jaws have the suspension for a fast grip and release. Jaws are made of tough heat-treated alloy steel. This aluminum pipe wrench is built for Extreme durability and comfort.