A well designed bevel gauge with an easy locking mechanism, designed to be ergonomic and allow you to lock the angle with one finger or thumb, meaning that you can record a transferable angle, even in awkward positions.
Long-lasting and durable with hard-wearing materials this is a great-value, handy item to make marking up easier, simpler and still accurate.
A classic, tried-and-tested measuring method; sometimes the old ones are the best.