Solid Bronze Dead Bolt for gates and doors. All outside trim pieces are solid cast bronze. Keyed cylinder, screws, strikeplates, keys and a few internal parts are solid brass The latch, internal security plate, and security screwsare made of steel and some die cast parts. Included is a plastic dust cover that goes behind the strikeplate on the door or gate Single cylinder type lock has key on one side and a turn knob on the other. Uses the common Schlage 5-pin C keyway. 2 Keys are included. The Schlage C keyway and may be rekeyed (by a locksmith) to fit your existing keys if you have 5-pin Schlage type keys. All fasteners necessary for installation are included. Large Model Dimensions: Knob trim plate measures 2-1/2" wide by 2-7/8" tall Knob trim plate projection is 1-1/2" Cylinder trim plate measures 2-7/8" wide by 3-1/16" tall Cylinder trim plate projection is 1" Small Model Dimensions: Knob trim plate measures 2" wide by 2-1/2" tall Knob trim plate projection is 1-1/2" Cylinder trim plate measures 2" wide by 2-9/16" tall Cylinder trim plate projection is 7/8" Please note: These locks can be special ordered to accomodate up to a 3-1/2" door thickness and with 2-3/4" backsets. Please call our office for information.