Step Plate Adapter Set Necessary for pulling and installing bearings, gears, or other parts found on hollow shafts or housings. They may be used with Grip-O-Matic® pullers and Push-Pullers®, as well as shop presses. 8074 Set 8057 – O.D. 1", I.D. 3/4" 8058 – O.D. 1-1/8", I.D. 7/8" 8059 – O.D. 1-1/4", I.D. 1" 8060 – O.D. 1-3/8", I.D. 1-1/8" 8061 – O.D. 1-5/8", I.D. 1-1/4" 8062 – O.D. 1-3/4", I.D. 1-3/8"