Flat 7400 628. The 7400 and 7401 are designed for use on aluminium single or double doors with Adams Rite deadlatches or cylindrical locksets with 1/2" (12.7mm) to 5/8" (15.9mm) latchbolt projection. They feature an ultra compact design and are non handed.. Innovative and compact robust stainless steel split-jaw design maintains the high level of security. Fail safe/fail secure switchable. Opens electrically with over 15kg of sideload pressure. Retrofits all previous Adams Rite strikes