Yale Lock Cylinder 1000 Series 40/30mm Polished Brass High Security Knob with 4 Keys for Front Doors and Apartment

HIGH SECURITY CYLINDER: This patented 6 pin cylinder with brass housing provides a high level of security for your front door with protection against picking. Button cylinder: close and open your door inside with a knob and outside with a key. Ideal for patio doors or areas where a quick exit is required - a twist on the knob is enough to lock or unlock the door. PIN REVERSE KEY: This cylinder uses a pin reversible key where the milling is on the flat side of the key blade. Key security card: To make key copies of our patented cylinders, you must present your key card to authorized dealers. MEASURE YOUR CYLINDER: To ensure you purchase the correct cylinder size (A/B) for your lock, remove your old cylinder and measure the outer (A) and inner (B) part of the cylinder from the front to the center of the cam.