Professional ruler for commercial or occasional use Multi angle ruler and spirit level Manufactured from aluminium for strength and durability Measures acute, obtuse and 180 degree angles with 1 degree increments Total length of the ruler 24" / 600mm Comes with three individual spirit level bubbles perfect for working on horizontal and vertical levels Can be used as a ruler or a protractor 50cm ruler on each side Marks are deep etched into the ruler to prevent the markings rubbing off like on some rulers Metric measurements (in both centimetres and millimetres) Lightweight for easy storage and transportation as well as convenient usage In the middle of the ruler there is a protractor and on here there is two locking knobs so that the correct angle can be achieved without the ruler moving whilst using