Purchased from INFACTORY. Long-term storage. Size is shown in image 8. Details in image 10. The blade is double-edged. The blade is held in place by the grooves in the handle, so it doesn't move firmly even in the state shown in image 7. It's a type that you use while sharpening, like Blanchard's, but the ease of handling and maneuverability are good as described in the detailed explanation. Convenient for fine cuts like filigree work. Easy to sharpen, so it wouldn't be difficult to modify it if you prefer a single-edged blade. I've used it a few times and sharpened it. In the end, I found that having separate tools worked better for me, so I've been storing it. The mechanism for fixing the blade is simple but stiff, so it might be difficult for women to use.