Brass caster with retaining ring, open part: Brass roller design, rear and back without restriction when sharpening, keep the same direction, non-slip, smooth, and safe.Brass caster with retaining ring, open part . Make sure the rollers are not offset when sharpening, they should always be 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 plane: 82 mm. Maximum clamping width of the chisel: 58 mm. Fine Crafted and Durable: Made of premium stainless steel, not easy to rust, durable and long lasting. 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 securely fixed on the grindstone 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 scissor with a sharp blade. Saves you energy, but works perfectly. Characteristics: Materials: Stainless steel + brass. Clamping width: 8 mm to 82 mm. Product weight: 270 g. Item size: 9.7 x 4 x 4 cm. Contents: 3 chisel sharpening guides. 1 instruction manual (English language not guaranteed).