Check the listing for details. MARBLES Back Pocket Dual-Grit TOOL SHARPENER - MR291 - New In Package. Condition: New. Listed at 10.99 USD. Introducing the MARBLES Back Pocket Dual-Grit TOOL SHARPENER - MR291 - a must-have for all hunting enthusiasts. This top-of-the-line sharpener is designed to keep your tools sharp and efficient, ensuring a smooth and easy hunt every time. With its dual-grit system, this sharpener is perfect for both basic and advanced sharpening needs. Crafted by Marble's, a trusted brand in the hunting industry, this sharpener is built to last and withstand even the toughest tasks. Its compact size and lightweight design make it easy to carry in your pocket or backpack, while its sharp and efficient blade ensures a quick and easy cut every time. Whether you're a seasoned hunter or just starting out, the MARBLES Back Pocket Dual-Grit TOOL SHARPENER - MR291 - is the perfect addition to your hunting gear.