The No.29 Plastic protractor facilitates measurement and marking of inside, outside and sloped angles. It is ideal for construction jobs, cabinet-making and fine carpentry, where a standard protractor or t-bevel won't fit. Four-piece designFine black graduations from 0 degree to 165 degree in opposite directionsBrass lock nutFacilitates measurement and marking of inside, outside and sloped angles.Ideal for construction jobs, cabinet-making and fine carpentry where a standard protractor or t-bevel won't fit.