The Ultra Edge Blade. The Carburizing Hardening Process Leaves Added Carbon On The Cutting Edge. Blade Stays Sharper Longer. The Chrome Finish Helps To Prevent Rust And Maintain Optimum Performance. This Blade Fits An Andis Ag, Pro-pet And Oster A5 Clipper. Andis 9 Blade, Leaves Hair Five-sixty Fourths In. (2mm)