Simple design. Install very easyHighly adhesive. So, perfect for our kayaks and stand up paddle boards.They're expensive but they do work better than any other things I've tried for the same task...I installed then as another pair of tie downs on my touring board so I could handle more gear. They are very secure.Great for securing my cooler onto my sup.I also order two more so I can rig a anchor system for my sup.don't waste you time on suction cups.So far so good....they are holding up just fine.great product!! sticks really well and is very sturdy.