Master Lock 377KA Trailer Coupler Lock， Fits 1-7/8-Inch， 2-Inch and Most 2-5/16-Inch Trailer Couplers<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits 1-7/8 inch (48mm)， 2 inch (51mm) and most 2-5/16 inch (59mm) trailer couplers</li><li>Advance locking mechanisim resists picking and prying</li><li>Easy to install and remove</li><li>Resists rust and corrosion</li><li>Keyed alike</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41lfgc%2BiUNL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41rjCI6TZIL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41YgaQv-rnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41BjZB2xe8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/416pMKmFhrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Gf0p4cByL.jpg" noproxy>