The Thicker Fork Design Provides Extra Lift When Replacing Worn Out Ball Joints, Pitman Arms, Pickup Track Bars and Other Applications. The set includes five forks: 11/16", 15/16", 1-1/8", 1-7/16" and 1-5/8". The forks are threaded to interchange with either the handle for hammering or the pneumatic driver (.401 Shank) and a 6-1/4" extension that works with either handle to provide extra reach. The forks are heavy-duty forgings and the handles are heat-treated alloy steel.