The Cisa 3 point Multipoint Rim Lock. Has a steel case & striker. Offers great 6 Lever security, these are formidable looking Cisa locks. Operation Comprising 4 deadbolts & 2 vertical rods which are locked or unlocked by key from either side. Each 180 degree turn of the key throws the bolt 10 mm (4 throws = 40 mm total bolt projectio..