The Union 2650 rebated mortice latches are suitable for timber doors hinged on the left or right and requiring lever handle operation. Please note these are not suitable for use with unsprung lever handles. These latches are suitable for 13mm rebate. Latches with a case size of 64.5mm (2.5 inchs) are suitable for handles with a backset of 44.5/45mm. Latches with a case size of 76mm (3 inches) are suitable for handles with a 57mm backset. Finish : Electro Brass Case Size: 64mm Backset Size: 44.5mm.