1、GRINDING ANGLE ADJUSTABLE: Equipped with a measuring ruler, the grinding angle can be adjusted. The grinding angle is fixed by adjusting the length of the clamped object and aligning it with the scale of the measuring ruler. 2、CLAMPING RANGE ADJUSTABLE: Rotate the nut by hand to adjust the clamping range, and control the opening size through the adjustment knob to adjust the clamping range. 3、EXTENDED ROLLER DESIGN: Honing guide is easier to keep stable when pushing back and forth, and the sharpening stone is not easy to wear. The roller always keeps the correct angle for you. 4、CLAMPING FIRMLY: The circular handle knife type adds a 3 point clamping grinding knife that does not shake, and the accessories are added to clamp more firmly, suitable for more knife types. 5、ALUMINUM ALLOY MATERIAL: The body was made from aluminum alloy, heavy enough to support the weight of most chisels, wear resistant, anti corrosion, will never get rust after years of use.