Because nothing should be taken for granted, you need the proper security for your trailer. Maasdam offers several types of security devices to protect you against theft and keeping your trailer and other times secured. The Maasdam Universal Coupler Lock protects your hitch from being damaged, as well as preventing trailer tow away theft. 4-part system, including lock will work with 1-7/8-Inch, 2-Inch and 2-5/16-Inch couplers. The adjustable lock with six settings makes it easy to fit snug to your coupler. Stainless steel with green powder coating. 2 keys included