Extendable Handle Design: Length can be extended from 430 mm to 570mm without load reduction. Telescopic shaft can be lockable in 5 positions. 1/2-Inch Drive Design: 1/2-inch drive head delivers up to 512N.m (378lb.ft) of torque. Suitable for medium-duty and precision works. 360-degree rotating Cr-Mo drive head lets you work at any angle. Securely Hold Sockets: This Extendable Socket wrench can break or loose rusted, decayed, stuck nuts and bolts. Ultra resistant bar for changing car wheel bolts. Professional articulated key. Durable to Use: Spring-loaded ball bearing retains sockets. Forged and hardened chrome vanadium steel construction.Smoothly contoured, round profile handle for a comfortable grip. Wear Reduce: This square drive radius corners can reduce socket wear by locking onto the sides of the fastener rather than the edges., Weight: 1.984160358 pounds, Manufacturer: MAXPOWER