Electronic Depth Gage Features include... 0-12" / 300mm Measuring Range Resolution: 0.0005" / 0.01mm Accuracy: + 0.0015" / 0.03mm Single Hook Base Dimensions: 3.94" L x 0.27" W Minimum Bore Dia: 0.812" Large LCD display for easy reading. Linear scale embedded in stainless steel blade. IP54 Rated Protection Furnished in fitted case.