SMALL ENGINE VALVE SPRING COMPRESSOR For Briggs & Stratton, Harley-Davidson, etc. Heavy-duty frame and screw for rigidity. Fits valve springs up to 11/16". Two jaw sizes are included (also sold separately). Part No. Description RL-23300 Spring Compressor RL-23360 Large Jaw Assembly RL-23370 Small Jaw Assembly WE CARRY A COMPLETE LINE OF AUTOMOTIVE MACHINE SHOP SUPPLIES Please Email or Call if you don't see something listed that you need.