The 2310 is a durable knob constructed from black General-Purpose (G.P.) Phenolic (B11) material. It features a molded hole with a diameter of 0.250/0.258 inches, designed to fit corresponding shafts. The knob is secured using an included #8-32 threaded, 7/16 inch long, slotted cup-pointed set screw. With an overall diameter of 1.19 inches, this knob is suitable for a wide range of control applications in industrial equipment and electronic devices.