6 Inch Stainless Steel Slide Bolt Door Bolt Door Safety Guard Latch Flush Bolt 8-Inch Stainless Steel Door Guard Lever Action Latch Lock Home Hardware I.829206572 Concealed Lock For Double Doors Unequal Double Leaf Door, Installation Instruction 1., Figure out and mark where to install the flush bolt(usually on inactive leaf of double door opening) and drill grooves., 2., Install the flush bolt on the door leaf and tighten with screws., 3., Line up strikes on the door frame or on the floor and drill holes, then tighten with screws., 4., Close the door, insert the pin into the hole, done. SIZE] - 6 (155mm) in length, 0.79 (20mm) in width, 0.67 (17mm) in height. [MATERIAL] - Constructed from 201 stainless steel, it is sturdy and wear-resisting for dry residential daily use. Not recommend use in bathroom and outdoor. [INSTALL] - Comes with screws and surface strike plate for installation. [EASY TO USE] - Concealed slide bolt door lock, closed side panels, spring tension lever... [MATERIAL] - Constructed from 201 stainless steel, it is sturdy and wear-resisting for dry residential daily use. Endura French Door Astragal - Metal Push Flush Bolt (Chrome [SUITABLE FOR] - Secure the opening for composite door, fence, patio door, wood door, or other doors. [EASY TO USE] - Concealed slide bolt door lock, closed side panels, spring tension lever action. VIBORG 25CM (10") 304 Stainless Steel Door Bolt Se... – Grandado Flush bolt usually be installed on inactive leaf of double door opening(top and bottom) to offer safety function. You can choose the material and color according to your needs. It has different materials with different colors, such as stainless steel, zinc alloy, brass etc.