High Quality Materials – This hidden door lock is made of high-quality stainless steel, featuring a solid structure, rust and corrosion resistance, sturdiness, durability, and a long service life. Simple to Use – The door lock features a built-in switch design for convenient daily use, offering a comfortable touch and a hidden lever mechanism that provides a smooth user experience. Hidden Lock – This concealed flat-head bolt is ideal for double doors. Installed on the side of the door panel, it maintains the overall flatness of the door surface without protruding hardware. Textured Appearance – Brushed surface treatment with a frosted matte black finish offers a sleek and look that complements contemporary decor. Suitable for various interior styles. Wide Applications – Includes 2 sets of concealed door bolts, compatible with various wooden doors and windows. Flat-head bolts are suitable for securing openings in composite doors, French doors, yard doors, wooden doors, double doors, and other door types. Specifications: Material: Stainless Steel Color: Matte Black Size: 15.2 x 2.1 x 1.8 cm (6 x 0.8 x 0.7 inches) Quantity: 2 Pieces Package Includes: 2 x Door Lock (Matte Black) 2 x Striker 8 x Screws Installation Method: 1. Mark the appropriate position at one end of the door leaf. 2. Use a tool to chisel a groove according to the marked position. 3. Insert the hidden pin into the slot and secure it with screws. 4. Open the door, drill holes in the floor or door frame, and install the striker. 5. Close the door and insert the pin into the hole in the floor or door frame. 6. Move the switch up or down to open or close the door. Note: Measurements are manually taken; please allow 1–3 cm variation. Due to lighting and display differences, slight color variations may occur. Actual product received may vary slightly.