Keyed lock entry set with 5 pin solid anti-bump lock cylinder provides a higher level of security. 3 keys are included,Durable solid stainless knobs with an electroplated solid stainless steel finish that is incredibly durable and will last a lifetime,All metal adjustable latch fits doors with 2-3/8’’ - 2-3/4’’ (60-70mm) backsets and doors from 1-3/8’’ to 1-3/4’’ (35-45mm) thick,Each CML door knob is ANSI Grade 3 certified, can show no wear for over 200,000 cycles,CML fully backs our products with a complete 3-year replacement that includes the finish and mechanical,Reminder: The screws that hold the door knobs to the door come pre-installed in the knob assembly. They must removed before installation,To avoid interior locking or unlocking problem, please keep the key cylinder and the thumb-turn button at same level and insert the cylinder into the the small hole behind the button