Master Lock Trailer Lock, Stainless Steel Adjustable Coupler Latch Lock, 2847DAT LOCK APPLICATION: Best used for vehicles, trailers, and RV hitch locks EASE OF USE: Six locking positions provide maximum flexibility; Rekeyable cylinder offers keyed-alike convenience DURABLE DESIGN: Water-tight cap protects trailer hitch lock from moisture and dirt SPECIFICATIONS: Coupler lock adjusts from 9/16 in. to 2-3/4 in. length INCLUDES: One trailer coupler latch lock, two keys