518 Surface Mount Single Point Mortise Lock

Part # 518 Replacement Door Mortise Lock for sliding Patio door Cylinder Color Style and Degree: Gray Style= 45 Degree Cylinder with faceplate  Face Plate Over All Dimensions: 6 1/8" Long x 3/4" Wide  Face Plate Top and Bottom mounting Screw Holes Center To Center Dimensions: 5-3/8"   overall depth 1-5/32 inch Black Style = 90 Degree Cylinder - will not come with faceplate customer will need to reuse their old one See video below that shows differences between the 2 options. and instructions on how to reuse your old faceplate.  You must replace the mortise lock with the same version (you can usually determine this as the old cylinder where colored either Gray or Black. The angle of the Gray cylinder is at a 45 degree angle and the black is at a 90 degree angle) If you do not choose the correct one keyed cylinder will not fit/operate. If your Cylinder is silver or gold looking color you have the newer style determine which style you need by the slot degree inside the cylinder (s