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Diamond sharpener utility patch. For sharpening knives, axes, woodworking tools and fishing hooks on-the-go and outdoors. Single-side #1000 fine electroplated diamond grit provides a highly durable sharpening surface for all basic re-sharpening needs in the field. ‘Hook’ fastener reverse-side firmly attaches the patch to the loop side of ‘hook and loop’/VELCRO type surfaces. Ideal for attaching to camping & fishing bags or jackets. Securely attaches to a flat surface that you apply loop tape, for easier and safer sharpening than plain ‘sharpening cards’ held with your fingers. Lightweight (20g) and barely noticeable when carried, ideal for taking out into the wilderness or on fishing trips where a quick sharpen-up may be needed but you don’t want to take a heavier knife sharpener/set with you. Credit card size: 83x50mm and only 2mm thick (inc. hook surface) providing an ideal sharpening surface for most applications. Made in the UK by Polymath Products.