Every Jack comes complete with an adjustable top clamp/clevis for use in clamping and winching. Safety bolt is designed to shear at 7,000 lbs. (3175 kg). For speedy disengaging, lifting unit automatically drops away when load is removed. 4-1/2" (11cm) long lifting nose for positive contact with load. Steel bar can be reversed for extra long life. Low pickup of 4 1/2" (11cm). 28 square inch base plate.