The DMT F70 Diamond Whetstone is designed for portability and convenience. It features a flip-open lid and handle, along with a swivel ring for easy attachment to a keychain. When open, it measures 140 mm, making it an ideal accessory for pocket knives. This whetstone is effective on even the hardest stainless steel blades, tools, and sporting goods. The handle folds down easily for protected storage. Please note that size guide images relate to standard sizes only, and brand sizes may vary. Group images are not representative of the quantity sold; the pack quantity is listed separately. This product is usually dispatched within 2 working days.