Sleek Design: These stainless steel guides with anti-rust black coating ensure long life and more elegant appearance.Wheel design with open locking ring: good lubricating wheel, easy to move while sharpening, same direction, non-slip, smooth and safe; make sure the rollers are not staggered when sharpening and always stay centered.ADJUSTABLE CLAMPING WIDTH: Adjust the clamping width by rotating the screw cap. Clamping width range: 1/4"-3.0" / 6-77mm. Planer iron clamping width is 1-3 inch, chisel clamping width is 1/4-2 inch.Easy to use: Rotate the screw cap counterclockwise, tighten the chisel or other knife tools, move the angle up and down to adjust the angle. Then tighten the screw cap clockwise and continue to bring your tools back to lifeMULTI-PURPOSE TOOLS: This insert can be used for wood chisels, planers, blades, engravers, carving knives, planer irons and flat chisels.