This item will ship with 3 types of strikes: Angle Strike (top of door), Mortise Strike (bottom of door) and Lip Strike (side of door)Guide Centers: 1 3/8"Guide Width: 1 13/16"6" length offers a 1-9/16" Projection from bracket when thrown8" length offers a 2 7/64" projection from bracket when thrown12" length offers a 2 1/8" projection from bracket when thrown18" length offers a 2 1/8" projection from bracket when thrown24" length offers a 2 1/8" projection from bracket when thrown (PLEASE NOTE: The 24" will come with FOUR guides)Screws includedSolid Forged Brass