Fowler Chrome Flex Magenetic Base Set with Black Dial Indicator and Mag Back Flex Arm Mag Base features: chrome plated flex arm 85 lb. pull magnet Holds rigidly in almost any position. V-base for mounting on cylindrical surfaces. Magnetic Indicator Back features: Use for positioning the indicator on most metal surfaces. Protective coatingAGD Indicator features: AGD Group 2 Dial diameter: 2-1/4 Travel: 1 Reading: .001 Continuous reading: .100 Carbide tipped point 72-585-500 Prop65 information pending -