Dial Depth Gauge Range 0 in to 12 in Graduations 0.001 in Accuracy +/-0.002 in Base Length 4 in Base Style Full Dial Position Side Dimension Type Inch Included Certification No Number of Measuring Rods 5 Operation Type Mechanical Range per Revolution 0.1 in Contact Point Shape Point Ball Depth Gauge Type Interchangeable-Rod Depth Gauge Dial Color Green Dial Reading 0-50-0 Includes 1 in 2 in 3 in (2) 4 in Extension Rods Pointed Tip and Ball Tip