Set of 4 6" flush bolts, dimension 5.91" x 0.79" (width) x 0.63" (depth), required groove depth is 0.63" (1.6cm), protruding bolt 0.55" (1.4cm). Made of 304 stainless steel, brushed finish, reliable and durable. Designed for use in wood door applications to secure the inactive leaf of a double door.... Recessed into the door edge and completely hidden when the doors are closed; < p>Spring loaded lever that swings up and down, easy to use and fits around the edges and back of the door; Comes with a full set of mounting screws (NO instructions are included, carpenter installation is preferred)