•Pre-Calibrated for perfect flatness and squareness•Two AGD group 2 indicators•Range: 0 - 0.25"•Reading: 0 - 50•Graduation: 0.0005"•Squareness: <=0.0005"•Revolution counter•3/8" dia. shank •4" distance between contact points•Precision CNC solid aluminum body •with black anodized finish•Carbide contact points•Suppied in fitted case