Secure Fit Winter Pool Cover Clips Above Ground Pools (10 Pack, 22 inches Long) - Made in USA!! Designed to grasp pool ledge features and hold your cover firmly in place Made in the USA from flexible, strong, and resilient material for long life Also available in 6" version (search Amazon for "Secure Fit Pool Cover Clip") Compatible with most metal pool ledge profiles (see mini-fit prototype photos) Not recommended for use with tubular pools or smooth, featureless ledges. Additional "good fit" and bad fit" photos available on our 4sigmallc home page.