Powerful Rare-Earth magnets allow for no-hassle quick ruler adjustments and firmly hold the ruler to the body|Durable and lightweight aluminum body with precision machined 45 and 90 deg edges can set a miter saw or table saw to the perfect angle|Effortlessly find center knockouts for EMT using the integrated conduit layout template|Deeply etched markings in the 12 in, rustproof, stainless steel ruler prevent the print from rubbing off|Large, high visibility bubble vial window with reinforced housing is easy to read|Place EMT and rigid conduit or conduit adapters in the body to quickly identify the conduit diameters to easily plan the electrical box layout|Integrated Stainless Steel scriber marks with pinpoint accuracy