- 15° to 45° adjustable grinding angle for straight and standard lawnmower blades. Set the best angle based on blade condition to maximize sharpening efficiency and results. - Ergonomic lever design. A fixed lever with four brackets securely locks the grinding target, reducing material removal during sharpening. The non-slip stainless steel handle lowers manual effort and user fatigue. - Adjustable vice for versatile fit. clamps blade width to accommodate 99% of mower blades, ensuring secure positioning. This helps your lawnmower blades last longer and stay sharper between maintenance. - Use scenario 1: after mowing thick or uneven turf, set an appropriate angle (within 15°–45°), position the blade in the vice, lock with the lever, and sharpen with controlled material removal for a precise edge. - Use scenario 2: service multiple mowers with different blade widths. Use the adjustable vice to accommodate varying blade sizes, enabling quick, repeatable sharpening across blades without remounting. - Use scenario 3: routine end-of-season maintenance. Secure the blade with the vice, choose a suitable angle, and sharpen efficiently to extend blade life and performance for the next season.