... seconds.Samurai Pro is easy to use. Just lock it down, slide the blade across to sharpen. The vacuum seal ... you mount it to almost any surface, horizontally, vertically even upside down. The tungsten carbide blades adjust to sharpen knives, scissors, shears ... you mount it to almost any surface, horizontally, vertically even upside down. The tungsten carbide blades adjust to sharpen knives, scissors, ...