WAHL 5 in 1 Pro Blade is an evolution of the original 5 in 1 blades. It has a dirt shield on the back of the blade to help keep dirt, debris and hair out, extending the life of the blade. Features a stronger adjustment tab and improved cutting technology. Adjusts to equal the cut of #9, #10, #15, #30 and #40. Fits all Wahl Arco, Bravura, Chromado, Figura, Motion and Li+Pro models.