Valve Spring Compressor | 10 Piece Spring Clamp Tool Kit with C Clamp, Collet Pusher Adapters, Extension Rods, and Lever for Car, Motorcycle, ATV, and Small Engine Repairs. SAFE & SIMPLE OPERATION: Instructions guide simple use, selecting the best sizes for compressing the valve springs or dealing with cylinder heads safely during removal and installation of most automotive, motorcycle, or other small engine.