When one spring breaks, the other isn’t far behind it. The door industry strongly recommends replacing the hardware as well. Which is why North Shore Commercial Door aims to have every part you could need for your E900-R One-Piece Door Hardware Kit, like the CW15 Replacement W-Hooks. Found on doors that require two springs on either side, these metal hooks attach to each end of the spring and are used to hold it in place. This allows the spring to safely extend with the motion of the door. Sold individually, these metal hooks come with an L-Plate, and keeper ring for installation. The CW15 and are compatible with the Plug-End (P-Series) type of spring. Each W-Hook Compatible models include spring models P928, P728L, P728, P528, and P328.