The Excel Hardware 76mm (3") Bolt Through Heavy Duty Tubular Mortice Latch SSS 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 heavier, more expensive lever handles. It can be used with both levers on rose & levers on backplate, even if 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...