JIMS - Magnetic Tappet HolderThe new JIMS Magnetic Tappet Holder easily holds the tappets in the tappet bores when changing or upgrading cams. Simply install the tool over the tappet cover and the rare earth magnets will magnetically hold the tappet in place while performing any cam chest work, a time saver for any technician. Designed to work on both Twin Cam and Milwaukee Eight engines. Includes a form fitted tray that will protect the magnets from damage when stored in a tool