Removes and Installs Pressed on Power Steering, Alternator and Air Pump Pulleys WITHOUT SLIPPING. The unique puller body completely houses the pulley hub to prevent slipping on even the tightest pulleys. Fits most domestic models including GM 3.1 and Quad 4 engines. Works on traditional V shaped pulleys and serpentine belt system pulleys. Also works faster than other conventional pulley pullers.