DIY Frequently Asked Questions / Spud Wrench')">
A generic name for many types of wrenches that have large, flat-sided jaws.
Good for general purpose plumbing use.
The Adjustable type is an all-purpose model with notched jaws ideal for various sizes of nuts. It is the handiest and most common.
The Fixed type works with large spud nuts under kitchen sinks.
The 4-in-1 is similar to the fixed type and is use for turning locknuts on the toilet tank, basket strainers and spuds.
The Closet type is designed for toilet tanks and bowls.
The Internal type holds the sink strainer basket in place while you tighten the locknut below. It can also remove or install closet spuds, pop-up plugs, and strainers.