When shrink wrapping your boat, prevent pole poke through with End Caps from Dr. Shrink.Designed to fit on top of a 2" x 4" support post, pole caps help to create a more stable support structure. The caps have slits every 90 for the strapping to slide through. When the material is shrunk the lobes of the end caps flex downward and eliminate pole poke through.Key FeaturesSlotted design accomodates strapsPrevent pole poke through