Features: 1. LS Valve Stem Seal Kit For Stock Powdered Metal and Bronze Guides 2. Separate Spring Locator is Required, Valve Stem Seals Keep Unwanted Oil From Entering the Combustion Chamber 3. Easily Install Valve Seals when changing your springs.The last thing you want to do is install valve seals using a socket and hammer. 4. This tool allows you to slowly press the seal down without damaging the seal. A must for every toolbox. .