Superior Tool 03960 4-Way Key-Fits Stopcocks, Sillcocks, and Valves-Steel Construction for 1/4"-9/32" and 5/16"-11/32 Internal Square , Black
SUPERIOR 4-WAY KEY Fits sillcocks and valves Prevents stripping sizes of 1/4", 9/32", 5/16", and 11/32" Heat treated steel