Standard 0.001" graduation Dial gauges having a bezel with an outside diameter of 57mm. All types come with limit pins and a bezel clamp as standard. The bezel clamp and lifting lever (optional) can be attached to either the right or left side. These parts can be easily installed and removed without tools. Secured adhesion between the bezel and crystal as well as the use of an O-ring ensure counter measures against water and oil permeation via the front face. A carbide contact point is used. The crown gear uses stainless steel that is resistant to wear and deformation. Application of a hard coating on the surface of the crystal makes the gauge highly scratch and chemical resistant.