Master Lock trailer lock set keyed alike — 2-piece 5/8" receiver & adjustable coupler, corrosion-resistant, pick-resistant

Master Lock 2848DAT is a two-piece keyed-alike trailer lock set that secures both the receiver and the coupler with one key for fast, reliable protection.

Keep an unattended trailer defended against opportunistic theft with this Master Lock convenience set. The package combines a bent-pin receiver lock sized for 5/8" receiver holes and an adjustable coupler latch lock, both crafted for strength and daily usability. With precision tumblers, hardened components, and four matching keys that operate both locks, the 2848DAT simplifies access while improving security for trailers, utility carts, and towable equipment.

How do these locks prevent easy theft of my trailer?

Both the receiver and coupler locks use hardened pins, stainless or chrome-plated shackles, and pick-resistant locking cylinders to resist cutting, shearing, and tampering. The bent-pin design keeps the receiver lock seated inside the hitch tube where it is harder to attack.

• Hardened receiver pin increases shear resistance.
• Chrome-plated bent shackle fits snugly in 5/8" receiver tubes.
• Pick-resistant precision locking mechanisms for added deterrence.
• Stainless steel components on coupler lock resist corrosion.

Will one key really operate both locks?

Yes — the 2848DAT set is supplied keyed alike so all four included keys open both the receiver and coupler locks. That reduces the need to juggle multiple keys during hitching and storage.

• Four identical keys included for redundancy and spare use.
• One key for both locks speeds hookup and removal.
• Keys stored in a small protective case included in the box.

How easy is installation and day-to-day use?

Installation is straightforward: the bent-pin receiver lock slides into a 5/8" hitch hole and the coupler lock adjusts to fit standard latch sizes. A quarter-turn of the key locks or unlocks quickly, making it convenient when you hitch or unhook frequently.

• Receiver fits 5/8" hitch holes without modification.
• Adjustable coupler shackle adapts to common latch dimensions.
• Quick quarter-turn locking action for rapid use.
• No special tools needed for typical setup.

What materials and build quality can I expect outdoors?

Master Lock pairs corrosion-resistant materials with hardened internal elements to balance weather durability and mechanical strength. The coupler uses stainless steel components while the receiver lock includes a chrome-plated bent shackle and a protective sleeve to limit rust and wear.

• Stainless steel shackle on the coupler for corrosion resistance.
• Chrome plating and protective sleeve on receiver shackle.
• Hardened internal pins and robust case construction.
• Designed for routine outdoor exposure and towing conditions.

Who is this for? This Master Lock 2-piece keyed-alike set is aimed at trailer owners, landscapers, contractors, and recreational users who need a simple, dependable way to secure both the hitch receiver and the coupler with one key. It’s suited for anyone seeking an easy-to-install, weather-tolerant locking solution for trailers, utility trailers, boat trailers, and tow equipment where convenient single-key operation and increased mechanical resistance are priorities.