Replacement screw drive mount clips go inside the C-Channel rail for some screw drive model garage door openers. They hold the screw in place inside the rail. Package contains 5 screw drive mount. Use With Screw Drive Opener Models: 2562, 2564, 2568, 3062, 3064, 4062, 406
Note: 7-foot rails used 13 mount pieces
Note: 8-foot rails used 15 mount pieces