I have a 17 bass cat, the trailer lock is the one that snaps down and then has a safety pin inserted along the bottom. I recently ordered a reese lock set for the coupler and the hitch pin, it was more or less plastic junk... I'm looking at the curt one now, that has the anodized blue cylinders. But would pay more for something all metal that's more sturdy. Let me know what you guys used?