Sealey dbg5010 dial bore gauge 50 160mm sealey dbg5010 p this dial bore gauge from sealey is a precision mechanism with oslash 55mm dial and locking rotating bezel offering an accurate method of measuring a bore or detecting a taper or ovality will indicate the deviation from set size by up to 5mm with an accuracy of 0 01mm probe body dial indicator anvil and spacer rings are also included p sealey dbg5010 dial bore gauge 50 160mm