MaterialMade of 304 stainless steel, high quality, will not rust, sturdy and reliable enough for residential daily using. Easy to UseSpecial design door bolt, easy to use and good for home safety. Easy installationEasy to fitcomes with rust-proof screws and surface strikes for stable connection. VisiableThe flush bolt latches - no bolts or mechanical parts are visiable. ApplicationOften used on one of a pair of wooden doors, leaving the other door for normal traffic, also suitable for internal doors,ideal for all kinds of wooden doors ,stainless steel doors, etc. 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 hidden 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 pin of the box into the hole in the ground. Condition: 100% brand new Material: stainless steel Silver colour Length: approx. 150mm / 200mm / 250mm, 6/8/10 inch (optional) Width: approx. 20mm / 0.79in Depth: approx. 17mm / 0.67in Package Weight: Approx. 92g ~ 133g