Color band denotes SAE/Metric measurement for easy identification. Feature non-slip open end. Chrome vanadium steel. Fully polished for professional appearance. Lifetime warranty. Mounted in convenient storage/carrying rack. Set includes 1each: 1/4" x 5/16", 3/8" x 7/16", 1/2" x 9/16", 19/32" x 11/16", 5/8" x 3/4".