Black polymer with chrome plated zinc alloy. Stainless steel stem and lock nut. Large handle allows two finger grip. Flush mounts in a 2-3/8" x 2-3/8" hole. Surface mounts in a 1-5/8" hole with polymer spacer included. For door thickness 1/8" to 3/4". Face plate dimensions: 3-1/8" x 3-1/8". Cam Bar Adjustment: 1/2" - 3".