Kits include: 2X stainless steel M8 thread Eye Bolts, 2X stainless steel M8 slot nuts, 2X stainless steel M8 Heavy Duty Washer, 2X stainless steel M8 Spring washer Heavy-duty stainless steel: Rated 500kg working load , Made from anti-corrosive Stainless steel , Made from premium materials designed for use in harsh marine environments, No rust in salt water environment. Track-mounted Eyelets - Compatible with most track systems. 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. Quick Release Track Rail Adapter - Easy to Tighten, Easy to Loosen and Easy to Move.- No more permanent drilling holes on your kayak