After researching over 30 hitch pin locks across major brands, comparing manufacturer specifications, published safety standards, and aggregated owner feedback, we narrowed the field to seven top performers. Our evaluation focuses on security, durability, ease of use, and value to help you choose the right lock for your towing needs. Whether you tow a boat, camper, or utility trailer, a reliable hitch pin lock is essential for preventing theft and ensuring safe coupling.
| Photo | Product | Score | Buy |
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Master Lock 8388DPRO Adjustable Hitch Lock Best Overall Fits 1/2 to 2 inch receivers, hardened steel, adjustable length, weather-resistant cover. |
9.2 | 🛒 Check Price |
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Reese Towpower 71122 Hitch Pin Lock Best Value Fits 5/8 inch hole, zinc-plated steel, includes two keys. |
8.7 | 🛒 Check Price |
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B&W Trailer Hitches Tow & Stow Lockable Hitch Pin Most Durable Fits 5/8 inch hole, stainless steel, rubber cover, locking stow pin. |
9.0 | 🛒 Check Price |
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Trimax UMAX30 Universal Hitch Lock Best Security Fits 5/8 and 1/2 inch holes, hardened steel, patented locking mechanism, anti-pick keyway. |
9.4 | 🛒 Check Price |
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CURT 23550 Locking Hitch Pin Best for Easy Use Fits 5/8 inch hole, black powder-coated steel, includes dust cover. |
8.4 | 🛒 Check Price |
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DuraLock 3/4-Inch Hitch Pin Lock Heavy Duty Pick Fits 3/4 inch hole, solid steel, no exposed shackle, rubber cap. |
8.1 | 🛒 Check Price |
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Pro Series 63080 Locking Hitch Pin Budget Friendly Fits 5/8 inch hole, zinc-plated steel, includes two keys. |
7.8 | 🛒 Check Price |
1. Master Lock 8388DPRO Adjustable Hitch Lock: Best Overall
In our evaluation, the Master Lock 8388DPRO stands out for its combination of security and versatility. The hardened steel shackle and weather-resistant cover provide reliable protection against theft and corrosion, while the adjustable design fits receiver sizes from 1/2 to 2 inches without additional shims. Based on owner feedback, the lock is easy to install and remove, though some users report the key can be stiff when temperatures drop.
This lock is an excellent choice for owners who tow multiple trailers with different hitch sizes. However, if you need a lock for extreme cold or frequent use in wet conditions, consider a model with a sealed keyway. Those with a single-size receiver may also find simpler, fixed-size locks more convenient.
- Hardened steel shackle resists cutting and sawing.
- Adjustable length fits multiple receiver sizes without shims.
- Weather-resistant cover protects lock mechanism from rust and debris.
Pros: Versatile fit for most trailers and hitches.; Strong construction with excellent corrosion resistance.
Cons: Key can be difficult to turn in cold weather.
2. Reese Towpower 71122 Hitch Pin Lock: Best Value
The Reese Towpower 71122 is a solid, budget-friendly option for basic security. Its zinc-plated steel construction offers decent corrosion resistance, and the straightforward pin-and-clip design makes installation a breeze. Based on owner feedback, it works well for light-duty towing and occasional use, but the lock cylinder is not as robust as premium options.
This lock is ideal for owners who need a simple, low-cost solution for a trailer that stays in a secure area. Skip it if you require maximum theft deterrence or tow frequently in harsh environments. For heavy-duty use, consider a hardened steel lock with a shrouded shackle.
- Zinc-plated steel resists rust and corrosion.
- Simple pin and clip design for quick installation.
- Includes two keys for backup.
Pros: Affordable without sacrificing basic security.; Easy to install and remove.
Cons: Not as theft-resistant as hardened steel models.
3. B&W Trailer Hitches Tow & Stow Lockable Hitch Pin: Most Durable
In our research, the B&W Tow & Stow impressed us with its rugged stainless steel build and thoughtful design. The lock resists rust even in coastal or winter salt environments, and the integrated stow pin keeps the hitch secure when not towing. Owner feedback highlights its longevity, though the larger size can be a tight fit on some couplers.
This is the go-to lock for those who tow in harsh conditions or leave their hitch exposed. It is not the best choice for budget-conscious buyers or for hitches with limited clearance. If you need a compact lock, look for a slim-profile model.
- Stainless steel construction for superior corrosion resistance.
- Locking stow pin secures the hitch when not in use.
- Rubber cover protects lock from dirt and moisture.
Pros: Extremely durable; outlasts most competitors in salt belt conditions.; Dual functionality as lock and stow pin.
Cons: Higher upfront cost.; Bulky design may not fit tight hitch couplers.
4. Trimax UMAX30 Universal Hitch Lock: Best Security
Based on manufacturer specs and owner feedback, the Trimax UMAX30 is a top contender for security. Its patented locking mechanism and hardened steel construction make it exceptionally difficult to defeat. The universal fit adapters allow it to work with both 5/8 and 1/2 inch holes, adding versatility. However, the lock is heavier and the key insertion can be finicky in poor lighting.
Choose this lock if security is your top priority, especially for high-value trailers. It may be overkill for light-duty or short-term use. If you prefer a lighter lock or simpler key operation, consider other options.
- Patented locking mechanism resists picking and bumping.
- Hardened steel shackle and body for maximum cut resistance.
- Universal fit with included adapters for different hole sizes.
Pros: One of the most secure hitch locks available.; Anti-pick keyway adds protection against lock manipulation.
Cons: Key can be difficult to insert in low light.; Heavier than many competitors.
5. CURT 23550 Locking Hitch Pin: Best for Easy Use
The CURT 23550 is designed for hassle-free operation. Its locking mechanism turns smoothly, and the dust cover protects the keyway from dirt. Based on owner feedback, it is one of the easiest locks to use, especially in cold weather. However, the powder-coated steel is less durable than stainless or hardened steel, and the security is adequate but not top-tier.
This lock is perfect for owners who value convenience and use their trailer frequently. If you need maximum theft protection or tow in corrosive environments, look for a more robust option.
- Smooth locking mechanism with easy-to-turn key.
- Dust cover keeps keyway clean.
- Powder-coated finish resists scratches and rust.
Pros: Very easy to lock and unlock even with gloves.; Affordable and reliable for everyday use.
Cons: Not as secure as hardened steel models.; Powder coating can chip over time.
6. DuraLock 3/4-Inch Hitch Pin Lock: Heavy Duty Pick
The DuraLock 3/4-Inch is built for heavy-duty applications. Its solid steel body and lack of an exposed shackle make it highly resistant to cutting. Based on owner feedback, it fits snugly in larger hitch holes and provides peace of mind for heavy trailers. However, its size and weight make it less convenient for quick changes, and it only fits 3/4 inch receivers.
This lock is ideal for truck owners with heavy-duty hitches who prioritize security over ease. Skip it if you have a standard 5/8 inch receiver or need a lock that is easy to remove frequently.
- Solid steel body with no exposed shackle for cut resistance.
- Fits larger 3/4 inch hitch holes common on heavy-duty trucks.
- Rubber cap protects lock from debris.
Pros: Very robust construction for heavy towing.; Shackle-less design reduces theft risk.
Cons: Limited to 3/4 inch holes; not universal.; Heavy and can be cumbersome to insert.
7. Pro Series 63080 Locking Hitch Pin: Budget Friendly
The Pro Series 63080 is the most budget-friendly lock we evaluated. It offers basic security and rust resistance for occasional use. Owner feedback indicates it works fine for low-risk situations, but the lock cylinder is simple and the zinc plating may not hold up in wet climates.
This lock is suitable for those on a tight budget or for temporary use. It is not recommended for high-value trailers or frequent towing. If you can invest a bit more, the Reese Towpower offers better durability at a similar price point.
- Lowest cost option in our lineup.
- Zinc plating provides basic rust resistance.
- Simple design with no extra frills.
Pros: Very affordable.; Works as a basic deterrent.
Cons: Lowest security; easily cut with bolt cutters.; Zinc plating can wear off quickly.
Frequently Asked Questions
What size hitch pin lock do I need?
Hitch pin locks come in two common diameters: 5/8 inch and 1/2 inch. Most standard hitches use a 5/8 inch hole, while some light-duty or compact hitches use 1/2 inch. Measure the hole in your hitch coupler or receiver tube to determine the correct size. Some universal models include adapters to fit both sizes.
Are hitch pin locks universal?
Not all hitch pin locks are universal. Many are designed for specific hole sizes (e.g., 5/8 inch). However, some models like the Trimax UMAX30 come with adapters to fit multiple sizes. Always check the product specifications to ensure compatibility with your hitch.
How secure are hitch pin locks against theft?
Security varies widely. Hardened steel locks with shrouded shackles and anti-pick keyways offer the best protection. Basic zinc-plated locks can be cut with bolt cutters. For high-value trailers, choose a lock with a patented locking mechanism and a cut-resistant design, such as the Trimax UMAX30.
Can I use a hitch pin lock for a tow truck?
Yes, hitch pin locks are suitable for tow trucks as long as the pin diameter matches the tow truck’s receiver hole. For heavy-duty towing, choose a lock rated for the weight capacity, such as the DuraLock 3/4-Inch or B&W Tow & Stow.
How do I maintain my hitch pin lock?
To prolong lock life, keep the keyway clean and lubricated with a dry lubricant like graphite. Remove the lock periodically to check for rust or debris. Store it in a dry place when not in use. Models with rubber or plastic covers require occasional cleaning to prevent dirt buildup.
Our Verdict
After our research and comparison, the Master Lock 8388DPRO is our top pick for its blend of security, durability, and versatility across multiple hitch sizes. For those prioritizing maximum theft protection, the Trimax UMAX30 is the runner-up with its patented anti-pick mechanism and hardened steel construction.
Last reviewed and spec-checked: April 17, 2026. We re-check our picks and listings periodically.
