Grooves on one side and 2V grooves on the opposite side help prolong the life of the grinding hook by reducing wear during use. Upgraded hook grinder, a very useful fishing accessory that improves hook maintenance and sharpening reliability. Surface configuration: Single surface with a fine mesh for precise touch ups. Double surface with 180 coarse meshes for faster material removal when needed. Two grinding surfaces with different thicknesses meet the needs of different stages of knife sharpening and hook grinding, providing versatility in a single tool. Practical applications: Field fishing: quickly sharpen and refresh hooks during a trip to maintain catching efficiency. Outdoor cooking and camping: keep knives and fillet blades sharp for food preparation. Tackle maintenance at home or in a workshop: level up routine sharpening of hooks and small blades. Material and performance notes: Designed to accommodate different sharpening tasks with two thickness options. This setup supports both fine adjustment and more aggressive material removal for efficient edge refreshment.