Dualsided design for extended tool life One side has grooves and the opposite side features 2V grooves, which helps to greatly prolong the life of the grinding hook. Two thicknesses for versatile sharpening Two grinding surfaces with different thicknesses accommodate different stages of knife sharpening and hook grinding. Durable materials and precise workmanship materials and careful craftsmanship deliver reliable performance and long service life. Surface options and mesh details Single surfaces with fine mesh; double surfaces with 180 coarse mesh. Usage scenarios Home kitchen knife maintenance and hook grinding: keep everyday knives sharp and ready for use, with convenient maintenance of hooks. Professional settings: suitable for use in workshops or butcher shops where regular knife and hook sharpening is required. Field and outdoor gear care: effective for sharpening kitchen and hunting knives and maintaining hooks during outdoor activities.