Check the listing for details. C-Hook One Panel One Piece Doors for Garage Door Plug End Springs. Condition: New. Listed at 9.95 USD. C-Hook One Panel One Piece Doors for Garage Door Plug End Springs Replacement C-Hooks for One-Piece Garage Springs are important hardware that ensures springs are mounted properly. They install on the end of springs and hold them in place firmly attached to the door. This allows the spring to safely extend with the motion of the door. These metal hooks are designed to work with the E900-R One-Piece Door Hardware Kit and are compatible with Plug End P-Series spring models P928, P728L, P528, and P328. Features: For use with Plug-end P-Series Spring Models P928, P728L, P728, P528, P328Pack includes 1 C-Hook, 1 L-Plate, and 1 Keeper RingEach spring requires 1 pair of C-Hooks (2 hooks)One C-Hook installs on the kicker of the door, the other connects to the U-BoltUsed on single spring installations on one-piece garage doorsInstallation: Install spring hook thru the U boltStretch spring up and hook over lower bushing on the kicker. If hooks are not in line, twist spring in the direction it turns easiestAttach Spanner with bolt and nut on each endRepeat on opposite Jamb