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Master Lock® Coupler Lock


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  • $12.99

  • SKU: 859583

  • In Stock
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  • 1/4"-diameter, built-in, anti-sawing pin and pin tumbler mechanisms
  • Laminated steel outer coating
Go the extra mile to protect your trailer with this Master Lock Coupler Lock! Lock features a 1/4''-diameter built-in anti-sawing pin and pin tumbler mechanisms to prevent sawing and ensure that your trigger stays put. The Coupler Lock's outer coating is made of laminated steel for toughness and durability.
Rated 4.4 out of 5 by 12 reviewers.
Rated 4 out of 5 by Surprising Much to my surprise, this lock works very well and it is handy! May 9, 2013
Rated 5 out of 5 by very good product best lock for your money and easy to use I have use other lock and have had nothing but problems with getting the key to work after it has been in the water December 23, 2012
Rated 5 out of 5 by Perfect for Purpose I bought this lock to use on a swing away tongue locking pin. This lock works perfectly for that function. July 8, 2012
Rated 5 out of 5 by Master lock I fine the master lock to be the best . This is my 2nd lock I still use the old lock. Two boat trailers and I pland on getting a 3rd for a uiltly trailer. August 3, 2011
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5 years, 5 months ago
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At this time we do not have the ability to get all four keyed alike.
3 years, 2 months ago
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Top 50 Contributor
Top 50 Contributor
That was not available when I purchased mine.
4 years, 6 months ago
 - Sapulpa, Ok
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