The Pocket Winch Winder was designed to rewind nylon straps on: Weld On, Bolt On, or Slide Winches that hold 20-30 feet of strap. When the Pocket Winch Winder is inserted into the prybar holes, you can use it as a handle to rewind the loose strap. While rewinding with one hand, you can guide the loose strap with the other hand. This will save plenty of time compared to doing it by hand. Different Brands of winches have slightly different hole sizes and hole placement. The Pocket Winch Winder can be adjusted to fit the different hole sizes by simply squezing the sides of the Pocket Winch Winder together. The Pocket Winch Winder is ideal for flat bed trucks! Saving time is essential in industries that require hauling. The Pocket Winch Winder truly is a quick way to wind straps on truck bed winches! Here is a video link: http://www.youtube.com/watch?v=aeCkvyU9N2g&feature=player_embedded