Portable: The sliding and extendable design of the angle measuring tool can reduce space occupation, it is easy to carry and store when not in use. Multi precision measurement -angle: this angle finder can accurately measure angles between 10 degrees and 170 degrees, and it can measure both included angle and half angle at the same time, lock angle and divide also the angle perfectly. Easy to use: place it on the work area, slide the ruler into the desired shape and tighten the screws. There you can make perfect measurements and now you can transfer and track them on any material. Widely Used: This protractor is handy for tile, brick, stone, wood, laminate, etc. cuts and any projects you can think of. Perfectly for any DIY enthusiast and woodworker. Product Material: Made of high quality aluminum alloy, this protractor is superior and sturdy than traditional plastic protractors; it is scratch resistant and very durable.