This metal wrench has dual openings - 1/2" and 9/16" - to tune up standard congas and certain bongos and timbales in no time. The LP227A has a rubber handle to cushion your hand while you're cranking your quinto and tuning your tumba. And since it's tailor-made for percussion, you won't have to spend precious seconds searching through your gig bag to find the wrench size you need.