Stainless Steel MaterialOur bolt lock are made of high quality stainless steel. Polished chrome, an elegant touch, strong and durable, not easy to rust and corrode,not easy to be broken, heavy duty and has strong corrosion resistance and can be used for a long time. Concealed Door Security BoltsSpecial design door latches for internal door, comprise of a flat solid steel shoot running in a long continuous guide attached by the backplate. Slide bolt latch can provide solid closing mechanism to secure the door, providing enough strength and stability for any door. ensuring that it can maintain the original look when receiving huge impact. Easy to InstallThe flush bolt latches Just screw the screw on the lock and use it. is a door catch which provides latching for internal doors where no locking is required. All fixings required are supplied. We suggest that you should call a professional locksmith or someone suitably trained. Wide ApplicationSliding door lock are widely used for internal doors, cabinets, bathroom, toilet, window, furniture, pet gate lock, patio, bedroom and cupboards,etc. Suitable for all types of wooden doors and stainless steel doors, etc... Ideal choice for home security doors and interior doors. -- Door bolts for internal doors can be installed vertically or horizontally, the door latch bolt can be pushed left and right. The lightly sprung latch mechanism makes opening and closing doors effortless. -- Gate latch used latest electroplating and polishing technology to ensure a perfect long lasting. Enhance wear resistance and hardness, protects the metal surface and have a good insulation performance. -- Door lock internal widely used for use on doors, cabinets, Bathroom,Toilet. Suitable for ordinary security doors and interior doors include all wooden doors and stainless steel doors, to give your private space more security. Note: Please check that bedroom door lock meets your requirements before purchasing. Installation method: 1. Mark the appropriate position at one end of the sash. 2. Use a tool to chisel a groove according to the marked location. 3. Insert the internal door latch pin into the slot and secure it with the screws. 4. Open the door, drill holes in the floor or door frame and install the dowel. 5. Close the door and insert the door lock bolt of the box into the hole in the ground. Size: 1: length: 15.2 cm, 2: length 22 cm Color: 1: silver, 2: red bronze, 3: bronze, 4: gold Package includes: 1pc * door bolt