This brand new Seiwa / Kyoshin Elle 5mm (compatible hole with other Seiwa / Kyoshin Elle 3mm irons) single prong stitching punch that's an excellent way to ensure your stitching is smooth and even.This high quality tool is used to punch holes in a precise diamond shape that is optimal for stitching leather. This single prong tool is designed for going around corners, evening out the correct number of holes ensuring proper size continuity with previously punched holes and punching corner holes.This Seiwa / Kyoshin Elle pricking iron is excellent as a stitch punch to ensure accurate and easy to sew holes are left in your leather. Please note this sizes are between the points of the prongs, this differs to the way Craft Sha hole are measured (distance between the edges of the prongs). Seiwa irons are compatible with Craft sha using the following data: Craft Sha 1.5mm = Seiwa 3mm, Craft Sha 2mm = Seiwa 4mm, Craft Sha 2.5mm = Seiwa 5mm, Craft Sha 3mm = Seiwa 6mmThe blade of this single prong Pricking Iron is the same as that of other 5mm Seiwa / Kyoshin Elle Stitching Punches and nippers that make nine holes per inch or four holes per centimetre. Recommended for small cases, purses and watch straps or similar applications where fine stitching is required.This high carbon steel tool is made in Japan to the highest standard and will last a lifetime. Most pricking irons are available in 1, 2, 3, 4, and 6 prong versions and are spaced in 3mm, 4mm, 5mm and 6mm. Collect them all for the ultimate in stitching versatility in any thickness of leather Please note that you should always use a soft-headed hammer (never a metal one) to gently tap this stitching chisel into your leather and that when removing it, you should always take it straight out of your leatherwork, not side to side, as this might snap the prongs. Avoid using this tool on leather thick enough to make removal difficult, instead use a wider pricking iron.Only other 5mm Seiwa / Kyoshin Elle Stitching Punches and Nippers, 2.5mm Craft Sha Pricking Irons, or other nine holes per inch diamond hole pricking irons are compatible with this size.