Unique central locking mechanism with Noga designed spring-loaded bearing. Dial Gage Holder With Power On/Off Magnetic Base(176 LBF) Central locking mechanism with spring loaded bearing Instant fixation in any position. Black finished Arms. / AGD2 standards Main movement gears are made from high-quality brass with resistance to wear and rust The spindle rack and contact points are made of hardened stainless steel, the case is made from forged brass Rotating Bezel with clamp Easy to read aluminum dial face with anti-glare finish Interchangeable point Reverse Counter