The Dirty Gardener STA-Rat Semi Tandem Pin Axle Release Tool for Truckers King Pin Release (115 to 150 LBS of Pulling Force) The foot rotates to accommodate all pull release mechanisms. STA-RAT's foot has non-slip spikes to avoid slippage while in place. The foot and upper hook are made from stainless steel and are heat treated for long term return on the investment. The long tube grip is foam rubber for comfort and safety.A rubber knob on the top, used to push down while reloading, fits comfortably in the palm of the hand. Light-Weight (3lbs) and portable, the STA-RAT is compressed in length (23.5 inches), making it easy to handle and store away.