"For pulling jobs requiring an internal pull, i.e., pilot bearings","Includes four collets sizes: 3/8 inch to 1/2 inch, 9/16 inch to 11/16 inch, 5/8 inch to 1 inch, and 1 inch to 1-1/4 inch to 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, and then attach the slide hammer BLIND HOLE BEARING PULLER SET MST4581B | Matco Tools