that big socket is what you use to keep the crank from turning while you break the crankbolt. i have the same one from snapon. if you plan on doing the timing belt change yourself you are gong to need it. i paid 67 buck for it which is pretty cheep. another good idea to do when you change your timingbelt is to gobuy the valve cover gasket set. its like 13 dollars from honda and it replaces all the gaskets in the valve cover. might as well since youll have it off anyways.

 

anyways....welcome to he forum, glad to see another D17 rollin around