A great little tool when working in a tight spot. Easy to calibrate so you can get a high level of accuracy every time. Extremely handy tool that you have on your tool box and it gets your job done just so much better. 360° angle measuring capability is good and extremely handy. Magnetic base is shaped as a “V” groove, that means it can be placed on any pipe securely and much more accurately. Self-Calibration function. +/-0.1° Accuracy. You can measure in both degrees and percentages. Audible buzzer at 0 degree horizontal. Padded bag included. Based on high accuracy professional technology for use in all construction applications. With heavy duty aluminium extrusions, this level is suitable for:General building and construction. Roofing and roof pitching. Balustrades and staircases. Plumbing and drainage. Machine set-up. Interior decorating. Fencing. Window and door framing. Extremely robust and will last many years and produce constant accurate results and readings over and over again.