Hickory Hardware PA1311-BI 1-1/2-Inch Charleston Blacksmith Knob, Black Iron Black Iron Round Charleston blacksmith collection Diameter: 1-1/2 inch D: 1-1/2 inch p: 1 inch New or replacement hardware for your home Black iron 8-32 x 1-Inch machine screw Style: Rustic D:1-1/2-Inch P:1-Inch B:5/8-Inch