Review on Motormic Trailer Hitch Lock - 5/8" Extra Long Black Pin with One Locking System - Includes 1 Safety Clip and 5 Anti-Rattle O-Rings - Fits 2" and 2.5" Tow Receivers (Class III, IV, V) by Phillip Ellis

This product would be worth buying if the contact sizes were as advertised or a few thousand larger. 5/8 inch is slightly smaller than 5/8, even with paint, and once it wears out, which isn't long, the pen size approaches 39/64, which is well under 5./8 and smaller than any standard pen, for you can get the result I was that the gap between it and the receiver for several hundred miles made the tip slide back and forth and up and down so far that the pinholes on my receiver were gouged out enough to require a weld repair was. So NO, I do not recommend this product. Waste of $20 IMO.