OTC's 6981 Blind Hole Puller Set is a versatile solution for blind or "hidden" bearings in machinery and equipment commonly found on the factory floor or farm shop Innovative expanding collets are placed through the bore of part to be removed then expanded with an actuator pin so that the lips of the collet secure a positive grip for pulling The unique design of the pin adapter allows the option of using a slide hammer to pop the bearing or bushing from it's seat, or use with a pulling bridge for tight or stubborn fits 5 Collet/Pin combinations: .300 to .350 inch (1.5 inches reach), .350 to .438 inch (1.5 inches reach), .438 - .563 inch (1.75 inches reach), .563 - .865 inch (2.5 inch reach), and .865 - 1.25 inches (3 inch reach) Forged and/or machined at OTC's factory in Owatonna, MN; includes easy to read component application chart and instructions; Rugged blow-molded storage case keeps tools contained and organized