About this article Possibility of adjusting its clamping width by turning the screw cap. Clamping width range: 8 to 82mm. Maximum clamping width of the plane: 82mm. Maximum clamping width of the chisel: 58 mm. Brass roller, rear and back without restriction when sharpening, keep the same direction, non-slip, smooth and safe. Design with retaining ring and open part. Make sure the rollers are not offset when sharpening, they should always remain centered. Turn the screw cap counterclockwise, attach the chisel or other tools, mount it and adjust the angle. Then tighten the screw caps clockwise, the edge of the blade is securely fixed on the grindstone or sharpener, rub the knife back and forth until your tool is more precise and sharper. Suitable for sharpening a wood chisel, a plane, a blade, a chisel, a carving knife, a plane iron, a flat chisel. It must be a great partner to help you have a scissor with a sharp blade. Saves you energy, but works perfectly. Finely crafted and durable: Made of premium stainless steel, not easy to rust, durable and long-lasting. < /ul>