* Diamond Awl: Creates a small, diamond-shaped hole. Best for fine leatherwork and creating a clean, consistent stitch line.
* Round Awl: Makes a round hole. Used for larger stitching holes or for punching holes for rivets and other hardware.
* Scratch Awl: Used for marking lines on leather, but can also be used to create small holes.
* Stitching Awl: Used for hand sewing leather, often used with a waxed thread and two needles.
* Speedy Stitcher Awl: A specialized awl that both pierces and stitches the leather in one motion.
So, to answer your question directly: Awl.
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