The second generation Millenco Mantis lock features 65/95mm centres and is available in 2 variations. This lock features 550mm hook centres and is normally used on the master door in a pair of French doors. Operation: Lift lever or double spindle. Latch reversal: Undo the screw or screws (depending on the model) in the latch to remove. Reverse, reinsert and replace screw(s).