Trailer Coupler Lock By Trimax  From 1 7/8 - 2 5/16 Sizes Part# UMAX100 This item is New. The UMAX 100 features an exclusive design that provides 360 degrees of hardened steel protection for your unattended trailer. Provides instant security for your camper, boat or trailer when they are not hooked up to your vehicle. Features 1/2 turn technology that cannot be false locked. Easy Installation. Slide ball up into coupler and replace u-shackle. Fits all of the following couplers and more... 1 7/8" or 2" Fulton Atwood 2" UFP Bulldog 2 5/16" couplers Fulton Heavy Duty Surge Brake (Reverse Mount)   One size fits all (from 1 7/8", 2", to 2 5/16", all coupler types) Key hole cover slides up to seal out dirt and grime Attractive ballistic grade nylon housing absorbs hammer blows and protects against weather 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. Huge 6 tooth, 3/8" dual ratchet locking system Hardened 5/8" 16mm steel shackle AVAILABILITY OF OTHER PARTS: We have many other parts available from Jeep to trucks. If you do not see what you are looking for in our store, give us a call 407-658-4848.  PAYMENT POLICY: We accept payments via PayPal or Visa,MC, or Discover over the phone. If you have any questions of how to pay for your purchase, feel free to give us a call. SHIPPING & FEEDBACK POLICY: We try to ship out the same or next business day after receipt of your payment. Item and shipping has to be paid in full. Please leave feedback when you get your item so we know you got it. If you have any problems when you receive your item, email us. We will leave feedback for you after you leave feedback for us. RETURN POLICY: Returns: We gladly accept returns. There will be a 20% restocking/handling fee. No returns on installed or altered parts. We test all electrical items and make sure they are in working order prior to selling them. Therefore, there are No returns on electrical items. No refund on shipping charges.