This Tubular Mortice Latch latch contains bolt through holes either side of the spindle hole, which enable use of the through bolts supplied with our lever on rose handles. Finish: Satin Silver OR Polished Silver. 64mm (2.5 Inch) Or 76mm (3 Inch) Latch Cases. Fire Rated FD30/60. 10 Year Warranty. Bolt Through. Easy Fit Design - Dust Socket & Face Plates Included. Bolt-through Tubular Mortice Door Latch 76mm Overall with 57mm Backset 8mm Spindle Follower Polished Chrome Finish Strike Plate, Dust Socket and Screw Fixings Included, Manufacturer: Access Hardware.