100mm long taper blades, hardened and polished for long accurate life. Each blade is marked with its size and folds into a polished steel case with thumbscrew. 26 x Imperial blades: 0.0015, 0.002, 0.0025, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.020, 0.021, 0.022, 0.023. 0.024, 0.025″
