4” x 4” with 5/8” Radius Corner Stainless Steel - 304 Grade with Powder Coat Flat Black Finish. Gauge: 2.5MM, (.097" ) For Door Thickness: 1 5/8" to 1 3/4" thick doors Includes matching screws. Non-Removable Pin - Pin is only removable by loosening the set screw and these hinges are perfect where security is an issue. 3 Pack