National Hardware® N181-628 Posi-Glide Screen/Storm Door Closer, AluminumFor wood or metal screen. Storm doors & other lightweight doors. Adjustable closing speed. Positive latching, patented posi glide shock absorbing system for resisting wind damage. Patented design, with screws. Positive latching assures that the door completely shuts in the latch. Door will swing open approximately 90 degree. Aluminum posi glide door closer For wood or metal screen Storm doors & other lightweight doors Adjustable closing speed Positive