A knob that can be used by pushing the knob, and then push it again to store the knob. Knob x 1, fixing plate x 1, spacer x 1, installation instruction manual x 1, mounting screw x M3 x 0.7 inches (18 mm), mounting screw x M3 x 1.2 inches (3 x 30 mm), push the knob can be used by pushing it back to store the knob. Screw tightening torque is 4.4 lbs (2 kg).