Lisle's Non-Slip Pulley Puller removes and installs power steering, alternator, air pump and similar pressed on pulleys with no slipping. The unique puller body completely houses the pulley hub to prevent slipping on even the tightest pulleys. Works on traditional V-shaped pulleys and serpentine belt system pulleys and also works faster than other conventional pulley pullers. Fits most domestic models including GM 3.1 and Quad 4 engines.