10 Best Trailers Locks Reviewed as of March 2023

Reviews Scanned

Master Lock 379ATPY Universal Trailer Hitch Lock , Black

Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers
Trailer lock is best used for vehicles, trailers, and RVs
Trailer coupler lock features advanced locking mechanism to resist picking and prying
Trailer hitch lock is constructed from zinc to resist rust and corrosion
Includes one trailer coupler lock, two keys

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Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT

Coupler Lock,Universal

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Funmit Trailer Lock Universal Coupler Ball Lock Fits 1-7/8", 2", and 2-5/16" Couplers, Boat Camper Accessories for Travel Trailers Adjustable Heavy-Duty Steel Hitch Lock Yellow

✅FIT: Funmit trailer coupler lock are designed to fit snugly in 1-7/8”, 2”, 2-5/16” couplers and ratchet is adjustable with 11 locking positions. Each ratchet is tightly engaged with the lock body, it will never be pulled open by brute force like other coupler locks!
✅HIGH QUALITY: The u-shape trailer lock is made of heavy-duty solid /rigid A36 Steel and aluminum alloy,it's durable, rustproof and weatherproof. Passed QC product quality certification
✅SAFETY: The trailer hitch lock is made of high-quality materials and combines with the last anti-theft technology to ensuresafety,and the U-shape lock can resist picking, prying and drilling
✅CONVENIENT: It is easy and quick for you to install and remove,and bright yellow color can provide high visibility
✅WARRANTY 100%: The replacement trailer locks come with a 90 day manufacturer limited warranty back by Funmit, you can feel a 100% confident buy and enjoy a 24 hours pro tech online help any time

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REESE Towpower 72783 Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel, Yellow and Chrome

DIMENSIONS: 9” x 9” x 3”.Material:Steel
BUILT TO LAST: The REESE Towpower Universal Coupler lock is a premium lock constructed with an aluminum body and heavy-duty steel lock bar. Distance between lock shackle holes center to center is 4-1/2 inch
UNIVERSAL FIT: Ratchet design is adjustable with 11 locking positions and fits 1-⅞”, 2”, and 2-5/16” couplers.
DETERS THEFT: Bright, deterrent yellow color is durable, highly visible, and an essential accessory to all types of trailers.
SECURE PROTECTION: Easy-to-install lock resists picking, prying and drill outs. Guards against truck or trailer towaway theft in storage.

Master Lock - (3 Keyed Alike Universal Trailer Coupler Locks 379KA-3

In Stock with a delivery time of 1 to 5 days. This is a set of 3 Keyed Alike trailer coupler/tongue locks and is ideal when needing multiple locks that utilize ONLY one key. The same key opens all three locks. Each lock comes with two keys, therefore you will receive a total of six keys with the purchase of this 3 pack. Limited Lifetime warranty.
These locks protects unattended trailers and guards against tow-away theft. The universal trailer coupler lock fits 1-7/8in (48mm), 2in (51mm) and most 2-5/16in (59mm) couplers by Reese, Fulton, Valley, Atwood, Shelby, Putnam, Hammerblow, Dutton, Lainson, and UFP.
This simple design is difficult to defeat because when it's locked on the trailer the lock rests on top of the coupler (see image) thus thwarting blunt force from downward hammer strikes. It also rotates (less rigidity) making it harder to break with sledge hammer force.
Rekeyable cylinder for keyed alike convenience with an advanced locking mechanism that resists picking and prying. Each lock weighs 2.4 lbs. and is simple to install and remove.
Made with Reinforced Zinc Die-Cast resists rust and corrosion. Few materials provide the strength and toughness of zinc alloys. Impact resistance is significantly higher than cast aluminium alloys, plastics, and grey cast iron. Zinc alloys offer high strengths (to 60,000 psi) and superior elongation for strong designs and formability for bending, crimping and riveting operations.

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Reese Towpower 7088300 Heavy Duty Coupler Lock , Grey

Universal, fits all couplers.Fit Type: Universal Fit
Secures trailer when not being towed
Ratchet design with eleven locking positions. Bright theft deterrent silver
Fits 1-7/8, 2 and 2-5/16 inch trailers
Two theft proof square keys are included

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Master Lock 605DAT Shackle 15/16" Length x 7/16" Inner Width, 2" Body Width, Solid Brass Coupler Lock, Gold

Solid brass coupler latch lock with 3/4in (19mm) shackle.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
Precision pin tumbler mechanism for superior pick resistance
Resists rust and corrosion
Lock design protects shackle from cutting and sawing
Case hardened steel shackle

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CURT 23521 Black Trailer Tongue Coupler Lock, 1/4-Inch Pin Diameter, Up to 3/4-Inch Span

DEPENDABLE SECURITY. To help protect your trailer from theft, this trailer lock is made from high-strength steel and has a padlock-style design.Fit Type: Universal Fit
EASY TO OPERATE. This padlock-style trailer tongue lock has a heavy-duty look to deter theft, and uses a simple 1/4-turn lock activation for convenient locking and unlocking as needed
VERSATILE. With a 1/4-inch diameter pin, this trailer coupler lock fits latch-type couplers with a maximum span of up to 3/4 inches
WEATHER-RESISTANT. This trailer pin lock is protected from the elements with its black painted finish, while the coupler pin is shielded against corrosion with a durable zinc plating
TWO KEYS INCLUDED. For your convenience, two keys are included with this trailer tongue lock. You can keep the spare key in a discrete location for emergencies or give it to a friend for helpful access

AMPLOCK U-BRP2516 RV/Trailer Coupler Lock (fits 2 5/16 inches Ball Coupler with Straight Lip only) | Made in Canada

Molded to fit the specific shape of your trailer or Caravan (RV) 2 5/16 inches coupler when unhitched
Materials used by AMPLOCK provide good rust resistance for use in all climates
Easy to use with AMPLOCK’s push and lock system
The strongest lock to secure your trailer or caravan (RV) made with high quality materials and control and identification key system

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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

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