55 Series devices for all types of single and double doors with mullion, UL listed for accident hazard installations. Fits doors stiles as narrow as 1 3/4" (44 mm). Device functions Device ships EO/DT/NL/LCrossbar length 42" (1067 mm)Crossbar height to finished floor 36 13/16" (935 mm) at centerLock stile case 7 1 /4" x 1 3 /16" x 2 1 /4" (184 mm x 30 mm x 57 mm)Hinge stile case 7 1 /4" x 1 3 /16" x 2 1 /4" (184 mm x 30 mm x 57 mm)Crossbar tubing 1" (25 mm)Projection Crossbar neutral ? 3 3/4" (95 mm) Crossbar depressed ? 2 3/8" (60 mm)Latch bolt 3/4" (19 mm), throwFasteners and Sex bolts (SBN) Includes screw pack for 1 3/4" (44 mm) and 2 1/4" (57 mm) thick metal or wood doors. Sex nuts and bolts included.