Track Mount Tie Down Eyelets, M6 Metal Eye Bolts, 316 Stainless Steel, Hold Bungee Cord or Ropes Up to 0.6 Inch ，Pack of 4 316 Stainless steel. Anti-rust even in salt water environment，maximum corrosion resistance Track Mount Tie Down Eyelets good to hold a cooler, fishing plier lanyard/net, paddle leash or other kayak accessories to the track A Tie Down Spot - Perfect to secure a cooler ,fishing plier lanyard ,paddle leash, fishing net , or other kayak accessories to the track. No more drilling Holes on the kayak again. Easy to Tighten, Easy to Loosen and Easy to Move.- No more permanent drilling holes on your kayak. Screw Size: Outer DIA: 1.1 Inch. Inner DIA: 0.6 Inch. Total L: 1.57 Inch. Weight: 1.0 Oz. Package List: 4 Sets of Kayak Rail Mount Tie Down Eyelet including