[Complete Accessories] This door entry system comes with 3 matching keys, just in case you lose your key. 2 fixing screws. [Easy Installation] This lock cylinder can be mounted quickly and easily with a Phillips screwdriver. The cylinder locks can also prevent lockouts and tampering attempts. To prevent screws that are not long enough for installation, we offer two fixing screws to choose from. [Wide Range of Applications] They can be used as replacement locks or for new installations. This door cylinder is suitable for wooden doors, security doors, and all interior doors. Entrance or bathroom doors, double or single sliding doors, balcony/terrace doors, garage doors, cellar doors, or barn doors. [Good Quality] The lock cylinder is made of zinc alloy, which has good hardness and strength. Matte finish. The cylinder is strong and not easily damaged. [Quality] The products are manufactured to strict quality standards before leaving the factory, with anti-drilling protection and superior quality.