1. Chisel sharpener is made from cast aluminum. Totally coated with anti-rust paint, not easy to rust, lasting and . 2. By rotating the screw-cap to adjust the clamping width.The sharpening guide fits chisels from 3mm to 47mm in width, and plane irons from 34mm to 79mm in width. 3. Sharpening angles can be accurated to set using sharpening jig by adjusting the tool projection. If chisel projection 30mm for 30 Degree and 40mm for 25 Degree angles, planeiron projection 38mm for 30 Degree and 50mm for 25 Degree angles. 4. The design of replacing steel wheel with a bearing wheel, using more smoothly. The honing guide can precisely sharpen edge for your tools due to the working face was carefully processed. 5. Honing guide can be used for wood chisel, planer, blade, graver, graving knife, plane Iron, flat chisel, edge sharpening. And use easily works on both oilstones and waterstones. Specification: Clamping range: 0-55mm Scope of application: chisels, carving knives, planers Main thruster: double bearing Colour:Blue Material:Cast iron Package Contents: 1* Chisel Honing Guide Jig Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.