[quartet]

Can someone tell me which of these tools i need based in the information below:

lash screw : 5/8
allen size: 5.5mm

These are some neat tools, just can't see which applies to my application. Here is the link with the size selections:
http://www.proformparts.com/catalog/wrench_tools.html

Thanks,
Travis

PS.
Unless someone has a better tools for adjusting valves. I really don't want to order this darn thing.