Adjustable WrenchPrecision jaws allow you to snugly lock-in on nuts and bolts. Tension spring stabilizer and smooth-moving knurl ensure first-rate adjustability. Masterful, best-of-both worlds design provides maximum strength at a very low weight. Wider handle design helps minimize hand fatigue. Wrench Type: Adjustable; SAE/Metric: SAE; Metric; Opening Size(s): 1 1/2"; 38mm; Opening Type: Adjustable.