Aiskaer Leather Stitching Punch Set, Diamond Chisel Tools, 4mm White Steel 1/2/4/6 Prong for Leather Craft DIY Review (2026)

What is in the set

This set includes four diamond-shaped stitching chisels with 1, 2, 4, and 6 prongs, all sharing the same 4mm spacing between teeth, along with a case and a bag to keep them organized, and instructions for use. Having four prong counts rather than just one tool lets a single set handle a full range of stitching layouts: the 1 prong tool is used for single holes, corners, or awkward tight spots, the 2 prong tool for shorter curves or small pieces, the 4 prong tool for the bulk of straight-line stitching, and the 6 prong tool to punch more holes at once along longer straight runs, speeding up repetitive stitching work.

White steel construction

The chisels are made from white steel, a carbon tool steel valued in cutting and punching tools for the sharp edge it can take and hold. A rhombus-shaped diamond tooth profile is standard for stitching chisels because it produces the angled holes needed for a proper saddle stitch, where two needles cross through the same hole from opposite sides. The teeth on a set like this generally benefit from being lightly polished or stropped before heavy use, since a smoother tooth surface both punches more cleanly through leather and pulls back out with less drag and resistance.

4mm spacing and what it suits

The 4mm spacing between prongs is one of the more common stitch spacings in leathercraft, well matched to bags, belts, and other medium to heavy weight leather goods where a bold, visible stitch line is expected and looks intentional rather than out of place. On finer goods like slim wallets or small cardholders, though, that same 4mm spacing can look noticeably coarse and heavy relative to the scale of the piece, which is why makers often keep a finer 3mm or smaller set on hand specifically for delicate small goods rather than relying on one spacing for everything.

Using the different prong counts

Working through a stitching line typically starts with the 4 or 6 prong tool to punch the bulk of a straight run efficiently, then switching to the 2 prong for tighter curves where a wider tool would not follow the line accurately, and finishing corners or single adjustment holes with the 1 prong tool. This layered approach, using the right prong count for each part of a stitch line rather than forcing one tool to do everything, is the main reason a four-piece set like this is more practical for varied projects than buying a single fixed-width punch.

Care and realistic expectations

New diamond chisels, including budget-friendly white steel sets like this one, often arrive with teeth that grip and resist pulling back out of leather more than an experienced maker would like, and lightly polishing the tooth faces with fine sandpaper or a polishing compound before use is a common step to smooth that out. Keeping the chisels clean and lightly oiled between uses helps prevent rust on the carbon steel and keeps the punching action smooth over repeated projects. For hand stitching bags, belts, and other bold-stitch projects, this set's mix of prong counts covers the range most makers need without buying four separate tools individually, and the included case keeps them organized on a crowded workbench.

Frequently asked questions