Introducing the 'Magnusson Aluminium Alloy Angle Measurer', a precision tool that carries a Lifetime Guarantee, providing you with ultimate peace of mind. This ingeniously designed measuring instrument is your go-to solution for determining internal and external angles ranging from 10 to 170 degrees. Moreover, it offers exceptional functionality with its half-angle measuring capability of 5 to 85 degrees. This robust and reliable accessory is not only beneficial but a stellar addition to your toolkit, perfect for both professional use and DIY projects.