One pair of keyed alike gladhand locks with 4 matching keys. Helps prevent against unwanted connection of tractor trailers. Made of a highly durable polypropylene compound. Quick, convenient, and easy to install deterrent. Fits most standard, angled, and swinger gladhands. Economical alternative to more expensive metal locks that can rust. The pair of locks come with 4 matching keys, (keys are not available separately). Approximate dimensions ea = 3 1/4" x 2 1/2” x 2”Approximate net weight pr = 12 oz