Brass roller with retaining ring, open part: brass roller design, back and forth without restriction when sharpening, keep the same direction, non-slip, smooth, and safe.Brass roller with retaining ring, open part. Make sure the rollers are not offset when sharpening, always keep them centered. Adjustable clamping width: can adjust the clamping width by rotating the screw cap. Clamping width range: 8 to 82 mm. Maximum clamping width of the planer: 82 mm. Maximum clamping width of the chisel: 58 mm. Finely crafted and durable: Made of premium stainless steel, not easy to rust, durable and strong. Fixed angle, easy to use. Turn the screw cap counterclockwise, attach the chisel or other tools, mount it and adjust the angle. Tournez le bouchon de vis dans le sens inverse des aiguilles dune montre, attachez le ciseau ou d'autres outils, montez-le et ajustez l'angle. Then tighten the screw caps clockwise, the edge of the blade is well fixed on the grinding wheel or sharpener, rub the knife back and forth until your tool is more precise and sharper. Widely Used: Suitable for sharpening wood chisel, plane, blade, chisel, carving knife, plane iron, flat chisel. It must be a great partner to help you have a chisel with a sharp blade. Save your energy, but work perfectly. Not easy to rust, durable and strong. Sharpening guide made of premium stainless steel, very strong. Brass roller with retaining ring, open part. Brass roller, back and forth 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, always keep them centered. Adjustable clamping width. The clamping width is adjusted by rotating the screw cap. Clamping width: 8 to 82 mm.Maximum clamping width of the plane: 82 mm.Maximum clamping width of the chisel: 58 mm. Fixed angle, easy to use. 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 well fixed on the grinding wheel or sharpener, rub the knife back and forth until your tool is more precise and sharper. Great partner to help you sharpen your chisel blade. The mounting guide is suitable for sharpening wood chisels, planes, blades, chisels, carving knives, plane irons, flat chisels. Features: Material: Stainless steel + brass. Clamping width: 8 mm to 82 mm. Item size: 9.7 x 4 x 4 cm.