Included is a small magnetized screw driver to very easily remove or install the keeper and scratch or damage your head like universal clamp type valve spring compressors No need to remove the rocker arm shafts Outstanding Design: Roller ball thrust bearing provides smooth operation even with uprated performance valve springs Material: Made of high quality aluminum,textured and durable Save Your Time: Can change your valve spring in short time and won't damage your parts Easy To Use: Allows easy replacement of valve stem seals, valves, springs, and retainers(you can use a little antisneeze on the threads) Application: Compatible with Honda Acura B16 B18 H22 VTEC.(you can see the detail in the picture or the product description)