Unique 144 - position ratchet design and Smaller 2.5° swing arc
Chrome vanadium steel, chrome-plated
Black chrome finish for extreme corrosion resistance and smooth ground surfaces to reduce friction
Jaw: ground precisely to exact nominal size for optimum contact areas
Sizes: 8, 10, 11, 12, 13, 14, 15, 17 mm; 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 in