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The WS06 pairs a dual pin lock with a stainless receiver pin so you only need to carry one key for both. It's built by Weigh Safe specifically to work with their own line of Weigh Safe and 180 Hitch Ball Mounts, locking the height-adjustment pin and the receiver pin from the same keyway.
Housings are cut from high-strength aluminum with a stainless steel pin and a powder-coated finish, so the lock keeps working smoothly through rain, salt air, and temperature swings instead of seizing up.
Note: this lock combo is designed to work with Weigh Safe/180 Hitch Ball Mounts, not as a universal aftermarket lock.