The JOES design crew has come up with a practical system for quick installation and removal. The JOES bump stop tool is specially shaped to work with JOES bump stop shims. A quick push and your shim snaps in place. Each shim has a hole that lines up with a pin on the removal tool for instant removal. Designed for 5/8” or 1/2" shafts. Sold individually or in the Bump Stop Shim Kit which includes case, bump stop wrench and 4 of each shim, 1/16", 1/8", 1/4", 3/8".