Allstar 1/2 inch Box Wrench 3/16 inch Allen Wrench Valve Lash Wrench for T and D Machine Assemblies features a valve lash wrench. It features a 1/2 inch box wrench and 3/16 inch allen wrench. It is designed for use with t and d machine assemblies. The valve lash wrench saves precious time and eliminates fumbling with two separate wrenches. It is backed by a 90-day limited factory warranty and sold individually.