Yale 10-2103-3545-KC-2201 500 Plus Series Cylinder-Double-35/55-Satin Euro Profile Cylinder, Satin Nickel, 35/55

STANDARD PROTECTION CYLINDER: This patented 5-pin cylinder with brass housing provides a high level of security for your front door with burglary protection. Double Euro profile cylinder (key - key): lock and unlock your door from one side if there is no key on the other. SAWN KEY This cylinder uses a locking mechanism with sawn key, which means it is equipped with pins of different lengths to prevent the lock from opening without the correct key. MEASURE YOUR CYLINDER: To ensure you buy the correct cylinder (A/B) for your lock, remove your old cylinder and measure the outer (A) and inner (B) parts of the cylinder from the front to the center of the cylinder cam. Easy installation: loosen and remove the cylinder holding screw to release the cylinder. Insert the key from the inside and turn it slightly to align the cam with the cylinder housing. Remove the old cylinder and insert the new Yale cylinder. Turn the key to check if the latch and latch are moving, and replace the cylinder retaining screw to secure the cylinder in place., Manufacturer: Yale