4 D-Ring Tie-Downs with Plastic Pan Fittings, Anchor Trailer Cargo Load with Floor Flush Surface Mount D-Rings; Safe Tie-Down Working Limit 533 pounds, DC Cargo Mall

Mon conjoint les a installés dans la roulotte cargot, pour attacher une moto mais méfier vous prenez des vis très longues ,

I installed these tie-downs today. The process was very easy; find the positions where you want them and screw the plastic piece down with a couple of deck screws. Note that the tab in the plastic piece sits under the straight part of the d-ring. Its purpose is to put some pressure on the d-ring so it doesn't flop around when you don't have anything tied to it. After the plastic piece is in place put the d-ring in and mark the position of the hole in the metal piece. Drill a 3/8 inch hole through the trailer deck and put in a 3/8 inch bolt and secure with a washer, lock washer and nut from below.They are very secure and while not really flush with the trailer deck they don't protrude too much. It is nice to have additional tie-down points other than the corner tie-downs the trailer manufacturer provided.

Advertised as a pack of 4 but they only supplied 2.

You cans see in my attached photo that the tarp over my 7-1/2' Portland Pudgy is being held down well. What you don't see is that three of these D-ring tie-downs are what's holding it down. I screwed the tie downs to my dock and then fastened the tarp using carabiners through tarp grommets and these tie downs. When it rains the tarp collects a fair amount of water adding to the strain on these tie-downs. I've had no problems with that water or with the occasional winds that give them a good test. Add that these tie downs are low profile, so that when I move the boat there's nothing to trip over, and I'm happy.

For my cargo trailer.