KAI SELECT 100 One-Stroke Sharpener I used it 2-3 times when I first bought it, but I couldn't get the hang of it and then stored it for a long time. I think it's in good condition with little signs of use. Operation confirmed. The included single-bevel cartridge is unopened. [Product Specifications] - Size: 133 x 111 x 105mm - Weight: 875g - Materials: Main body case/ABS resin, whetstone/Alundum whetstone, ceramic whetstone, shaft/stainless steel, whetstone holder, whetstone spacer, joint, gear/polyacetal, rubber feet/styrene resin, washer/nylon resin - Cord length: 1.2m (AC power cord retractable) [Product Features] Speedy sharpening in one stroke. In just 10 seconds, restore sharpness by simply passing the blade through the groove once. Reproduces a sharp blade edge. The unique whetstone structure prevents "burrs" (grinding residue), resulting in a sharp blade edge. By exchanging the two types of cartridges for double-bevel and single-bevel blades, it can be used not only for Western knives but also for Japanese knives such as sashimi and deba knives. Detachable for easy cleaning. The whetstone cartridge is detachable and easy to remove. It can be washed with water, making it easy to clean off shavings. *Cannot be used for special blades such as bread knives, scissors, or tools. Thank you for looking.