High Quality Materials--This hidden door lock is made of high quality stainless steel, with solid structure, rust and corrosion resistance, sturdiness and durability, and durable. long service life.Simple to Use--This door lock adopts built-in switch design, convenient for daily use, comfortable to touch and hidden lever, which gives you a pleasant experience.Hidden Lock- -This concealed flat head bolt is best suited for one of the double doors. It is installed on the side of the door panel, which can keep the overall flatness of your door panel without the locks protruding.Textured Appearance--The brushed surface treatment, frosted matte black, beautiful and advanced appearance, will complement your modern decoration style. Suitable for a variety of decoration styles.Wide Applications--2 sets of concealed door punching bolts, suitable for all kinds of wooden doors and windows. Flat head bolts can be used to fasten openings in composite doors, French doors, yard doors, wooden doors, double doors or other doors.Specification:Material: Stainless Steel Color: Matte BlackSize: 15.2*2.1*1.8cm/6*0.8*0.7inchQuantity: 2 PiecesPackage Include:2 x Door Lock (Matte Black)2 x Striker8 x ScrewsInstallation 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 gusset.5. Close the door and insert the box pin into the hole in the floor or on the door frame.6. Move the switch up or down to open or close the door. Note: The data are all manual measurement, please allow 1-3cm error, due to the difference of light and display, there will be some color difference, depending on the physical item received.