These durable stainless steel D-rings are 4" in diameter. The large flip-up D-ring anchor point folds away when not in use, and is versatile enough to accept most tie down end fittings.
This D-ring is easy to install. Drill a 1/2" hole in the location that you wish to add the D-ring. Sandwich the two D-rings on both sides of the mat, with bolt inserted through new hole in mat. Then, tighten bolts.
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