1. ABS plastic case is light in weight and durable. 2. Relative/absolute measurement interchangeability angle and slope reading at any position Convert the measuring surface with built-in magnet for easy connection to the object to measure the workpiece. 3. Automatically close the portable size within 5 minutes, which is convenient for use with other measuring tools to expand the measurement range: 4. Drain angle and runoff slope level and tractor work alignment Set the blade angle of the circular saw blade Tool setting on the lathe, table saw, connecting table, band saw connecting fence or band saw platform monitoring 5. Easy to carry, can be measured anytime, anywhere.