The Excel Hardware 76mm (3") Bolt Through Tubular Mortice Latch PSS is specifically designed to be used with lever handles on roses, as it is pierced to accept bolt through fixings, & we would recommend it for the less expensive & mid range levers. It can be used with both levers on rose & levers on backplate, even though the lever sets do not require bolt through fixings. The 63mm latch is typically used with levers on backplates & the 76mm latch is typically used with levers on roses. This latch has a steel case & solid brass latchbolt; the forend & strike.. .