https://www.springfieldleather.com/Marking-Guide This Marking & Punching guide is a practical tool for punching or marking holes on straps or belts. The guide is adjustable, allowing you to match it to the width of the strap you're working with. The center holes enable you to scribe hole positions or punch holes directly using a drive punch. Additionally, it includes a 3cm (1-5/32”) oblong slot for added versatility. | Springfield Leather Company