Euro Profile B44M22 (House) - Double cylinderFor use with locks accepting Euro profile cylinders. B44M23 - Single cylinder (House)For use with locks accepting Euro profile cylinders. B4427 - Single cylinder with oval turn (House)For use with locks accepting Euro profile cylinders. B4424 - Single cylinder with small round turn (House)For use with locks accepting Euro profile cylinders. M22 - Accessory M23 - Accessory M24 - Accessory M27 - Accessory