Hex Dies are used for re-threading or cleaning bruised or rusty threads ideal for maintenance.
The Dies are extra thick to permit the user to rethread damaged or jammed threads and are not intended for producing new threads on bolts, pipes, or unthreaded bars.
The hex head shape is specially designed for use in die shock and adjustable wrenches.
Size: 5/16-1/2″
Outside dimension: 1″, 1-1/2″