Forcing Puller Screw Product Details Features and Benefits: . forcing screw tip 7503 OTC-310484. 3/4-inch Hex head. 3/4-inch - 10-inch Thread. Offers a black oxide finish.. Suitable for use on GM, Ford and Chrysler vehicles. Replacement Puller Screw, for 38850 Pulley Puller and Installer Set. 38990 Yes -