Fowler Vernier Protractor with Rectangular Head

Fowler's Protractors are invaluable tools for machinists, toolmakers, draftsmen and mechanics.
• Measures angles from 0-180 degrees.• Used to transfer angles and to set bevels.• 6" arm with knurled thumb lock nut.• Made of chrome steel with satin finish.• Measures 3-5⁄16" x 2". Rectangular head provides four working edges. Blade secured firmly at any angle by a lock joint and knurled nut.