Amazon.ca:Customer reviews: CZC AUTO Hitch Receiver Pin Lock 2 Pack 5/8 Inch Trailer Receiver Lock Keyed Alike for Class III IV 2 2-1/2 Inch Receiver Fit Hitch Bike Rack Tray Ball Tow Rope for Trailer Truck Car Boat
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Yes, they work. Yes, the covers stay attached to keep dirt out of the keyhole. But it would have been nice if the description was more clear about how long they are in relation to a 2 inch receiver, because they more than rattle around with the inch of play they have.