Instructions: To use, place knife on a stable surface with the cutting edge up and about 1/2 in of the blade tip extending past the edge of the table as shown in the illustration. While holding the knife handle with one hand, hold the AccuSharp as shown with your fingers through the opening formed by the handle and the finger guard. Remember: The Sharpener moves while the blade being sharpened remains stationary. Straddle the cutting edge of the blade being sharpened with the v shaped notch formed in the sharpener. With the head of the accusharp at about a 90-degree angle to the blade's edge. Press down lightly using thumb pressure to draw the accusharp along the edge of the blade. Work in one direction only, not back and forth! Several passes may be required before the blade's beveled edge conforms to the proper angle of accusharp. Once that angle is achieved, then two or three passes should be sufficient to give you a razor sharp edge. Remember: Light pressure is sufficient. Heavy pressure might cause you to lose control of the sharpener and possibly cause injury. The tungsten carbide sharpening blade in AccuSharp is of high-grade industrial quality and is one of the hardest materials known. Even so, after several years of use, it may become worn. Due to its unique design, the sharpening blades can be reversed to double its life. To reverse the sharpening blades. lay the AccuSharp on its side with the screws up. Remove the screws and separate the halves 4 of the handle as shown. The sharpeners should remain in the lower half. Simply switch the position of the sharpening blades (front sharpening blade to rear and rear sharpening blade to the front) taking care to keep the reference dot on the sharpening blades facing toward the tail end of the handle. If the finger guard becomes disengaged during this operation, secure both ends of it in the slots provided prior to reassembly.