The arm tip microdynamic feed mechanism is equipped with a 0.2 inch (6 mm) hole, 0.3 inch (8 mm) hole and 3/8 inch diameter hole, and a rotating clamp with an ant groove, making it easy to install the test indicator, dial gauge, and 0 points of the gauge needle.
Nogas unique countersunk spring bearing mechanism ensures smooth and strong tightening with a knob on the center of the arm.
The arms are chrome free black finish.