At Brookline, we take a common sense approach to keys and cylinders. All of our locks and panic devices are offered in small format interchangeable core (SFIC) as standard This style gives our customers complete control over their key systems and allows changing of cylinders, without delays and high labor costs. Our customers no longer have to disassemble a lock or remove an exit device from a door in order to change a cylinder. We strive to make the integration of our hardware as seamless as possible.Our Cylinders and Housings are constructed of solid brass and are designed for durability and ease of use. We offer fifteen different keyways in 6 or 7 pin cores. Our cylinders can have thousands of different change keys with many levels of sub master keys, master keys and grand master keys.