Material: chrome vanadium alloy steelColour: BlackHole distance: 4 mm (hole and center of hole)Aperture: 1 mmNumber of holes: 2/4/6 holesWeight: approx. 137gScope of delivery: 3 Leather Punching ToolsMaterial: Made of high quality chrome vanadium steel, high hardness, high resolution, can quickly penetrate leather/rubber/paper/cardboard.IDEAL PUNCHING TOOL: Manual punching of leather, essential if you make leather. Sharp, even tip creates clean, even holes.Save Time: It can eliminate gaps in leather craft projects. Sharp diamond teeth help drill holes quickly and easily, saving time and effort.Humanized design: the whole corner of it is rounded, so that it won't scratch your pockets or fingers. The slim size is lightweight and portable, making it easy to carry.Wide range of uses: suitable for hand sewing steering wheel sets, sewing heavy leather goods, sewing hand sewing sofa seat covers etc.Comment:1. The cut should be perpendicular to the perforated leather, angled and interrupted to avoid teeth marks.2. Don't hit with heavy hammer, you can use plastic hammer or nylon hammer.3. Use a padded tool to protect the cutting tip, such as an unsightly chalkboard or die cut.4. When not in use, you can apply a layer of oil between the cup body and the protective cover for maintenance