Em-D-Kay TSS, TSS220523, US3 Polished Brass, Brass Solid Replacement 1-1/4" Mortise Cylinder Lock. Mortise Cylinder is designed for indoor and outdoor use. Solid brass replacement lock cylinder With Standard Cam, 5 pin tumbler, Can be re-keyed, Can Work With Different Cams, keyed different. These Mortise Cylinders will fit into just about any Mortise Lock in the market. Different sizes are available depending on the door thickness.