Progressive, PMC3, US3 Polished Brass, Solid Brass Replacement 1-1/8" Mortise Cylinder Lock, Segal Keyway, designed for indoor and outdoor use. This solid brass lock cylinder contains a 5 pin tumbler, Standard Cam, an SE1 Segal keyway that can be re-keyed, it can work with different cams, and it is keyed different. This Progressive Mortise Cylinders is the perfect replacement cylinder, it will fit into just about any Mortise Lock on the market. Different sizes are available depending on the door thickness.