The LSM "One-Tool" is like having 16 valve lash adjusting tools in one. Now you don't have to buy a new valve lash adjusting wrench for each different rocker system. Buy "One-Tool" and you will always have the right tool to adjust your valves no matter what rocker system you have. The LSM "One-Tool" has great balance and feels good in your hand. It has a knurled anti-slip handle that gives you great grip even with the most slippery synthetic oils.