Set of 4 6 inch flush bolts, dimension 15cm x 2cm (width) x 1.6cm (depth), the required groove depth is 1.6cm, protruding bolt 1.4cm.. Made of 304 stainless steel, brushed finish, reliable and durable. Designed for use in wooden door applications to secure the inactive leaf of a set of double doors.... Recessed into the edge of the door and completely hidden when the doors are in the closed position;; Spring-loaded lever that swings up and down, is easy to use and fits the edges and back of the door;; Comes with a complete set of installation screws (NO instructions are included, carpenter installation will be preferred);