Fully adjustable. Fully articulated. The comfortable, generously sized arm cup turns in a 360° arc for complete freedom in positioning, and instant re-positioning. Place the sturdy, Anti-tipping, magnetic base plate on any steel surface and level by adjusting the two levelling bolts. This affordable, fully adjustable arm rest with the fully articulated arm, supports your extended arm while working. Steady your arm or hand, for greater weld control and reduced fatigue. The 2-section articulated arm is height adjustable [slide up or down the support column] and swivels quickly and easily for work in precise locations., Weight: 5.070632026 Pounds, Manufacturer: Strong Hand Tools