Stainless steel is made of high quality stainless steel, the nut is rust resistant and very durable. Stainless steel roller design, can move back and forth without restriction when sharpening. The direction is consistent when grinding, non-slip, smooth and safe to use. Clamping width range You can adjust the clamping width cover by rotating the screw, and the clamping width range is 5-82mm (0.2-3.2') Adjustable blade angle This chisel sharpener has an adjustable blade angle, making it ideal for woodworkers li>The open retaining ring design is open The design of the retaining ring type ensures that the roller will not deviate during the grinding process and is always centered. Note: The data are all manually measured, please allow an error of 1-3cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.