How to Punch Holes in Leather with a Round Strap End Punch
By Klum House: Bag making kits, bag sewing patterns, waxed | Published: 2026-10-23
Category: How-to Guides
Learn how to punch clean leather holes with a round strap end punch. Step-by-step guide for bag makers, plus tips to avoid common mistakes.
Quick Answer
To punch clean holes in leather with a round strap end punch, place the leather on a cutting board, position the punch, and strike it firmly with a mallet. For rounded strap ends, align the punch so the curve extends beyond the strap edge.
Why a round strap end punch gives a professional finish
A round strap end punch creates rounded leather strap ends that look finished and prevent fraying. It's a simple tool, but using it correctly makes a big difference in the quality of your bag projects.
This tool is designed for use with a mallet on a cutting board. The cutting board protects your work surface and allows the punch to cut cleanly through the leather.
Choosing the right size for your strap
The round strap end punch comes in different sizes. The size you choose should match the width of your strap. A punch that is too small will leave a weak point; one that is too large may cut off too much material.
If you are unsure which size to use, start with a punch that is slightly smaller than the strap width. You can always trim more off later, but you can't add leather back.
Step-by-step: Punching leather holes with a round strap end punch
- Mark your hole or strap end: Use a pencil or chalk to mark where you want the hole or the rounded end to be. For a strap end, draw the curve you want to achieve. Check that your marks are centered and aligned before cutting.
- Place leather on a cutting board: Lay the leather flat on a cutting board. Make sure the area you are punching is fully supported and not hanging off the edge. A stable surface prevents the leather from shifting and gives a cleaner cut.
- Position the punch: Hold the round strap end punch vertically over your mark. For a strap end, align the punch so the curve extends slightly beyond the edge of the strap. Double-check the alignment before striking; you can't undo a misplaced cut.
- Strike with a mallet: Give the punch a firm, single strike with a mallet. Use enough force to cut through the leather in one go. Avoid multiple light taps, which can crush the leather. A single decisive strike produces a cleaner edge than repeated taps.
- Remove the punch and check the cut: Lift the punch straight up. If the leather didn't cut all the way through, reposition and strike again. Check that the hole or rounded end is smooth and free of rough edges. Smooth the edges with fine sandpaper if needed.
Tools mentioned in this guide
- Round Strap End Punch: A round strap end punch is a tool that creates rounded leather strap ends for an extra level of finish on any bag project. Using this punch gives your straps a polished, professional look that elevates the overall quality of your bag.
Round Strap End Punch - Round Strap End Punch: It is used with a mallet on top of a cutting board, to protect your work surface. The cutting board absorbs the impact, prevents damage to your table, and ensures the punch cuts through the leather cleanly.
- Round Strap End Punch: This tool is also available as part of our Leather Straps Tool Kit. If you're just starting out, the kit provides the essential tools for strap making in one convenient set.
