This precision trigger switch has an actuating force of 2.25 lbs. to make the first pole; 6.5 lbs. passing through a detent to actuate the second pole. Housing is black thermoplastic, button is red thermoplastic and the side covers are black anodized aluminum. The U2-016 is military qualified to M8805/111-01. OTTO also offers a slightly wider version, U2-025, which is military qualified to M8805/111-04.