Dorex GX1B53 C32D Heavy-Duty Entry Knob – Stainless SteelGX1B 53 C32D Entry function suitable for office and storage room applications Architectural quality for heavy duty commercial applications High quality stainless steel finish For 1 3 8 to 2 door thickness 2 3 4 backset Optional backsets by special order: 2 3 8, 3 3 4, 5 Non handed field reversible Removable steel thru bolt mounting posts Knob diameter is approximately 2 1 4 3 rosette diameter 1 2 stainless steel latch throw; optional 3 4 latch throw