Ruler thick 1.5mm approximately, much strong than others ( 0.8mm typically The protractor can adjustable from 0 to 70 degrees and firmly every 5 degrees Loosens the nut first, adjust it to a suitable Angles, and tighten the nut to fix at this Angles Woodworking ruler is a multifunctional device for length measurement and Angles drawing.this tool for every woodworkers and Each woodworking ruler equip with a wall-mounted storage rack, which make it easily store, Manufacturer: LiRRvb