Loading... Please wait...Super Tuff” Valve Keys are fully adjustable in 18” increments. Crews no longer have to carry several keys to the job site, no longer have to worry about using a key that’s too long or too short for the job. Also, the hazards of keys hanging out of truck beds and theft possibility is eliminated. When not in use, the MARS Adjustable Valve Key folds down to a compact size to fit in a trunk, under a seat, or behind pickup bench seats. Not only can the key be used on a 2” operating nut but the handle has a built-in key for a curb stop.