Toilet Tank And Fill-Valve Nut V-Wrench
A 175 mm long, 8 mm thick double-ended V-wrench with serrated 90° jaws. The large end grips plastic fill-valve and flush-valve locknuts and wing nuts from about 40 to 75 mm across. The small end takes tank-bolt wing nuts and supply-line coupling nuts from about 16 to 38 mm. Being plastic, it won't crack porcelain or chew up plastic threads, and you can reach into the tight space under the tank.
bathroom plumbing wrench toilet