4 Thread Knurl and non-protruding jaw provides greater capacity and minimal head width equals improved performance in confined spaces. Up to 18 percent longer jaw avoids slippage or nut round off. Up to 20 percent greater jaw capacity supports bigger nuts and bolts. Precise jaw design grips tight the first time, every time. Superior quality by virtue of design - bigger, longer, thinner, tighter The new Channellock 10" Chrome adjustable wrench with wider capacity features improved performance and torque. Avoids slippage or nut round off. Supports bigger nuts and bolts. Up to 22 percent thinner jaw permits greater access in tight spaces.