Traderight Indicator Dial Bore GaugeDESCRIPTIONIf you are looking for a dial bore gauge, you are probably a mechanic or like to work on cars. Your new bore gauge will help you to measure the inside of your engine cylinders. Take three measurements of your cylinder with your engine bore gauge. You only need to measure as far as the piston travels. Change orientation and test again to see if the cylinder is perfectly round. Start measuring by calibrating your cylinder bore measuring tool