This is a screw-type edge creaser for leathercraft tools. Since it is screw-type, you can adjust it to any width you like. By heating it with an alcohol lamp, you can apply a crease to not only vegetable-tanned leather but also chrome-tanned leather. If you use it without heating, you can also draw lines at equal intervals, so you can use it as a divider to guide your stitching irons. The tip, the right side is made longer, so it is designed to catch on the edge of the leather and not slip easily. This one has a wide groove width of about 1.5mm. You can create a bold crease. Because you can draw a wide crease, it is highly recommended for those who want to sink the sewing thread but don't want to shave the grain side like a stitching groover. The handle is made of ebony, which is also used in high-end furniture, and it fits comfortably in the hand and is very hard, so you can use it for a long time. I also have other leathercraft supplies for sale. If you would like to purchase them together, I can discuss the price, so please take a look if you're interested. Leather tools are here ↓ #YLWorksLeatherTool #handmade #Leathercraft