[1]This honing guide holds and adjusts the angle at which the chisel edge touches the sharpening stone so that the entire blade can be sharpened evenly. Makes sharpening easier. [2]Get the standard sharpening angle by adjusting the distance between the top of the chisel and the honing guide: blade 2.9 inches/73mm to get 25, chisel 2.4 inches/60mm; blade at 2.2 inches/55mm to get 30, chisel 1.8 inches/46mm. [3]You can fix the chisel and planer blade between 0 and 2.5 inches (. 0-6.5 cm) by adjusting the knob to cover the common sizes. It is locked by the metal studs so that it will not come off even if it is tipped over. [4] wheels at the bottom, you can roll back and forth to sharpen your chisel easily, wheels, more stable, your work is done strictly and smoothly [EASY TO CARRY] placed in your pocket, tackle box or kitchen.Light and easy to carry, the best for your kitchen life. [QUICK SHARPENING]a good material that effectively sharpens kitchen knives. Colour:Black Material:iron Package Contents: 1 x Polished rail fixture Only the above package content, other products are not included. Note: Light reflection 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.