Vibe Door Bolt Necked 100mm on Black Antique for internal doors. This is a simple and easy to use sliding bolt which can be used in many applications around the home. The Slide Flush Bolt is finished in black antique and gives a neat and modern look. They aim to maintain security and ensure that doors remain closed. As they are. See images for dimensions. They are easy to install as they are surface mounted, which means they only require to be screwed in.