Wil-Lok M8 Narrow Style 5 Lever Dead Lock with a case size of only 2 inches & a back set of only 32 mm just over an inch from the face plate lends this lock to applications where you do not have a thick door stile to fit a traditional 2.5 or 3 inch lock. Normally found in French & Patio Hinge styled doors. Excellent value for your money & also av..