Square Head Protractor

General’s heavy-duty steel protractors are trusted by machinists and draftsmen worldwide to deliver crucial measurements with unwavering accuracy. The 6″ adjustable arm is ideal for setting bevels, taking measurements and transferring angles. Ultrafine etched graduations read from 0° to 180° in forward and reverse directions and will not wear or rub off. Made of ground stainless steel for precision and durability. Preferred by machinists, draftsmen & mechanics for setting bevels, measuring and transferring angles Made of ground stainless steel for optimum accuracy Permanently etched graduations from 0° to 180° in opposite directions 3-3/8″ x 2″ head 6″ adjustable protractor arm locks into desired position with knurled thumb nut