This Adjustable Leather Edge Stitching Creaser by Seiwa is really sharp, making it the best divider tool for hand-sewn leathercraft creations. With this leather stitching creaser or divider it is possible to draw stitching guides, creases, and screw in the edges of belts and small items.With this adjustable leather edge stitching creaser, you can adjust the width from approximately 12mm (maximum) and 1 mm (minimum). This leather edge stitch creaser works well for right-handed and left-handed people by simply changing the guides on the left or right based on your preference.  This Leather Edge Stitching Creaser can also be used as a freehand creaser by removing the metal stitching guide.Approximate Dimensions & Product Data:• Creasing Blade• Allen Wrench• Handle (wood)• Stitching Guide (metal)To use this Stitching Creaser, place the leather flat on a workbench. Adjust the metal stitching guide based on your desired depth, then grip the handle of the tool firmly and place the guide outside the edge of the leather and the blade on the surface of the leather edge you're going to mark. Run the tool along with the leather, smoothly while applying constant pressure. Add more pressure to make deeper creases. You can also adjust the metal guide depending on whether you are left or right handed by flipping the metal guide and inserting it back into the tool. This product contains only the scratch awl tip, and does not contain the groover cutting tool. Grooving blade sold separately.Please note: The cutting edge is sharp, handle it with caution and care. Keep out of reach of children.