For pulling jobs requiring an internal pull, such as pilot bearings set includes four collets which fit a wide range of applications set includes a 2-1/2 lb. slide hammer with t-handle housed in a blow molded plastic storage case includes four collet sizes: 3/8" to 1/2", 9/16" to 11/16", 5/8" to 1", 1" to 1-1/4". for pulling jobs requiring an internal pull, such as pilot bearings. set includes four collets which fit a wide range of applications. select the appropriate sized collet by comparing it with the application. insert the collet, expand it to fit the hole, then attach the slide hammer assembly. four collet sizes: 3/8 in. to 1/2 in., 9/16 in. to 11/16 in., 5/8 in. to 1 in., 1 in. to 1-1/4 in. set includes a 2- 1/2 pound slide hammer with t-handle. housed in a blow-molded plastic storage case.".