Global Door Controls Commercial Passage Ball Knob in Brushed Chrome Door thickness: adjustable 1 3/8-inch-1 7/8-Inch: backset: 2 3/4-inch: strike: ANSI 1 1/4-inch x 4 7/8-Inch curved lip Keying: Schlage 5 pin keyed: key: 2 five pin Nickel plated Construction: steel, zinc Dichromate resists corrosion, heavy duty spring cage reinforced for knob return Latch: 1/2-inch projection stainless steel; bore: 2 1/8-Inch hole retrofits all grade 2 cylindrical locksets Brushed Chrome finish Easy installation - minimum working parts