Trimax SXTC3 Premium Stainless Steel Coupler Lock (3.5" Span)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits couplers with up to a 3-1/2" span</li><li>O-ring keeps water， grime and dirt out of locking mechanism to ensure years of use</li><li>Protective rubber cap protects keyhole from water， grime and dirt</li><li>Type A key which is a spring loaded， 7 pin， high security key. Resists attempted drill outs. Rugged and durable， the key will not bend or break.</li><li>100% stainless steel</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21Y4TfOqHrL.jpg" noproxy>