Mitred Lever Lock Designer On Backplate Door Handle with Satin Chrome Duo Finish. Stunning interior door handles with a dual mixed finish lever is ideal for new doors or replacements. The Backplate size of 180mm x 40mm approximately is larger than most traditional door handles so ideal for replacing old door handles to give a new look to your home or office. Supplied In Pairs Complete With 7.9mm Spindle & Fixing and Thumb turn Spindle. This handle is to be used with a Mortice Sash Lock.