CZC AUTO Hitch Lock Set — 5/8" Receiver Pin & 1/4" Coupler Pin, Keyed Alike, Weather-Resistant

This CZC AUTO Hitch Lock Set includes a 5/8" dogbone-style receiver pin and a 1/4" coupler locking pin, both keyed alike to secure 2" and 2-1/2" trailer receivers and latch-type couplers.

When you tow a trailer, a compact, rugged lock set that fits both the receiver and the coupler reduces hassle and improves security. The CZC AUTO kit packs two complementary locks — a 5/8" diameter hitch pin with a 3-1/2" effective length and a 1/4" tongue-style coupler pin — finished in weather-resistant coating and supplied keyed alike so one key operates both pieces.

What sizes and trailer fittings does this lock set fit?

The hitch lock is sized for Class III/IV applications: a 5/8" diameter pin with a 3-1/2" effective length that works with 2" and 2-1/2" receiver tubes. The coupler pin is 1/4" diameter and suits latch-type couplers with a maximum latch span up to 2-1/2".

• 5/8" dogbone-style receiver pin — fits 2" and 2-1/2" receivers
• 3-1/2" effective pin length for common hitch setups
• 1/4" coupler pin for latch-type couplers up to 2-1/2" span
• Check measurements of receiver tube and coupler before buying

How easy is it to lock, unlock, and carry spare keys?

The set is designed for straightforward operation: insert the pin, rotate the lock cylinder, and pull on the head to confirm engagement. Each kit ships with two identical keys for convenience and spare use.

• Simple tubular lock cylinder — insert key and turn to lock/unlock
• Two matching keys included per set
• Pull test on lock head verifies secure installation
• Keyed-alike convenience avoids carrying multiple keys

What materials and finishes protect the locks from wear and corrosion?

Both locking pieces are built from high-strength steel to resist bending and cutting; the surfaces are coated with black electrophoretic paint to limit rust in outdoor environments. The lock core uses zinc alloy and the key is a sturdy round design for durability.

• High-strength steel construction for core components
• Black electrophoretic coating for corrosion resistance
• Zinc alloy tubular lock core and solid round key for longevity
• Built to deter opportunistic theft and endure regular use

Which towing accessories can this lock kit secure?

The CZC AUTO set works across common towing gear: hitch racks, bike carriers, cargo trays, ball mounts and trailers. It’s intended for typical passenger vehicles, trucks, and RV tow setups that use 2" or 2-1/2" receivers and latch-style couplers.

• Bike racks and cargo hitch trays
• Hitch-mounted ball mounts and tow ropes
• Trailer hitches on cars, trucks, and RVs
• Compatible with most latch-type couplers and receiver accessories

Who is this for? The CZC AUTO Hitch Lock Set is for vehicle owners who tow occasionally or regularly and want a simple, durable locking solution that covers both the receiver and the coupler using one key. It’s suited to owners of trucks, SUVs, RVs and cars that use 2" or 2-1/2" hitch receivers and latch-style trailer couplers. Verify your receiver and coupler measurements before purchasing to ensure a proper fit. CZC AUTO supports the product with a 30-day money-back policy and a 12-month warranty for manufacturing issues, and customer service is available for setup or fit questions.