Professional protractor features an open center and accurate 6" ruler across the base, 24 pack of protractors in total; Practical protractor with 2 circle measure, protractor measures 0 to 180 degrees left to right a...
Professional protractor features an open center and accurate 6" ruler across the base, 24 pack of protractors in total; Practical protractor with 2 circle measure, protractor measures 0 to 180 degrees left to right and right to left