Please Note : Communication is the best way to solve problems. If you have any problems after purchase, please contact us in time before opening the return . We will give you a satisfying solution. Designed to combine vibrations & Pneumatic force to allow for the easy removal of seized injectors. .Comes complete with a universal adaptor set that covers Bosch , Delphi , Denso, Siemens CR injectors which has solenoid coil or screw connections. .Covers 99% of injectors. .