Features: Enhances your property's security with these stainless steel mortice door bolts, featuring concealed star key operations for protective on door and window. Crafted from rustproof stainless steel and brass, these security rack bolts combine with engineered lock mechanisms for long time use durability. Ideal for property managers, safety homeowners, and facility maintenance seek access control solution without professional installation. Secure fire door, utility closets, or high traffics entry in residential homes, hotel, and industrial buildings with this discreets locking systems. The complete installation set includes star key and mounting hardware, enabling easy setups on wood or metal frame while maintaining discreets door aesthetics. Specifications: Materials: Brass Size: 1.25x2cm/0.49x0.79inch Color: Silver, Gold(Optional) Package Includes: 1pc Mortice Door Security Bolts Set note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.