SincereetaliAngle Measurement Tool: 2 in 1 with our clever idea of converging goniometer and ruler into a double graduation from 0 to 180 degrees, measuring lengths from 0 to 15 centimeters. Protractor Material: Polished stainless steel, brass lock nut. High quality stainless steel material resists durable work. Exquisite. Professional tool for scribing or measuring angles or lines. For scribing radial lines, setting bevels and transmitting angles. Adjust the suction cup by loosening the screw. Used for scribing radial lines, inclining and translating angles. The protractor ruler alarm and dial head can be disassembled; perfect for school, commercial, home, mechanical work, woodworking, etc. Product Description The angle protractor is made of sturdy stainless steel, permanently etched, durable and long lasting. Double division of 0-180 and 180-0 bidirectional mark and scale mark on the bottom edge of the semicircular dial head. This protractor ruler has a 150mm adjustable straight edge, which can be held in position with the knurled lock nut and can detect angles quickly and easily. The ruler protractor is suitable for chamfering, drawing radial lines, measuring and marking angles. The protractor ruler alarm and dial head can be disassembled; perfect for school, commercial, home, mechanical work, woodworking, etc. Specification: Material: Stainless Steel Measurement: Double graduation of 0-180 & 180-0 degrees in two directions; 150mm/6 protractor ruler Use: Adjust bevel, draw radial lines, measure and mark angles Applications: School, commercial, home, mechanical and woodworking applications, etc. Size: 150mm, 0-180 degree rotation Package includes: 1 Protractor, 0-150mm