Chrome plated zinc. Sliding lock button. Reverse bevel with flush strike. Flush cup installs in 2" diameter hole. Supplied with black plastic spacer for optional surface mounting. Screw size for cup is #8, case is #6. OD cup is 2-1/4", case is 2-1/16" x 1-3/4". For door thickness of 3/4" to 1-1/8".