Master Lock Black Universal Size Trailer Hitch Lock
Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY
Price as of 2026-06-21. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in towing products and winches
- •Risk-averse buyers — 5,933+ reviews give a highly reliable picture
- •You're on a tight budget — $2 above the category average of $38
- •AUTMATCH D Ring Shackle 3/4" Shackles offers a better rating (4.8/5) at a similar or lower price ($24)
- •META Hardware Trailer Hitch Locks — 57% cheaper at $17 (Score A-)
- •AUTMATCH D Ring Shackle 3/4" Shackles — higher rated at 4.8/5 ($24)
📊 Based on data analysis of 163 products in this category.
Mubboo Score: B+
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other towing products and winches
Computed from live Amazon rating, review count, and price across 163 towing products and winches · last refreshed 2026-06-21.
How It Compares
This Product Master Lock Black Universal Size Trailer Hitch Lock | Most Popular CURT 23518 Black Trailer Hitch Lock | Best Rated AUTMATCH D Ring Shackle 3/4" Shackles | Best Value META Hardware Trailer Hitch Locks | |
|---|---|---|---|---|
| Price | $39.81 | $19.97 | $23.99 | $16.99 |
| Rating | 4.6/5 | 4.5/5 | 4.8/5 | 4.6/5 |
| Reviews | 5,933 | 17,249 | 12,194 | 2,993 |
| Mubboo Score | B+ | A | A | A- |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Verify compatibility with your vehicle's hitch and coupler dimensions before purchasing, as some models may be too short or bulky for specific vehicles. These locks provide strong deterrence but can be defeated by determined thieves, so use them as part of a layered security strategy.
- High-quality, durable construction
- Excellent value for price
- Easy to install and use
- Effective theft deterrence and security
- Fit and clearance issues on specific vehicles
- Potential for rust or coating durability problems
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About Master Lock
- 8 products in our database
- Average rating: 4.5/5 across all products
- Price range: $8.99 – $118.85
- Categories: Bike Locks, cycling, towing-products-and-winches
Other towing products and winches
Bottom Line
Master Lock Black Universal Size Trailer Hitch Lock earns Mubboo Score B+. Priced at $40 — a premium option, above the category average of $38. Rated 4.6/5 from 5,933+ reviews. Strong buy if: buyers who prioritize quality over price in towing products and winches, risk-averse buyers. Skip if: you're on a tight budget — CURT 23518 Black Trailer Hitch Lock (Score A, $20) may fit better.
Frequently Asked Questions
Is the Master Lock Black Universal Size Trailer Hitch Lock worth buying in 2026?
It earns a Mubboo Score of B+, with a 4.6/5 rating from 5,933 reviews — better than 50% of towing products and winches we track.
How much does the Master Lock Black Universal Size Trailer Hitch Lock cost?
It is currently $39.81 — premium-tier pricing for towing products and winches.
How does the Black Universal Size Trailer Hitch Lock compare to other towing products and winches?
The category's most-reviewed alternative is the CURT 23518 Black Trailer Hitch Lock (4.5/5, 17,249 reviews, $19.97). The Black Universal Size Trailer Hitch Lock carries a Mubboo Score of B+ vs A.
Sources & References
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-21) and may change.