What a sewing awl does and when to use one

A sewing awl is a hand tool that punches holes through thick material so you can sew it by hand. Unlike a needle, which pushes through fabric, an awl makes a hole first, then you thread a needle through that hole. It works on leather, canvas, denim, upholstery fabric, and anything else too dense for a regular needle to pierce without bending or breaking.

You use an awl when a sewing machine cannot reach or when the material is too stiff for machine needles. Common jobs include repairing leather boots, patching heavy canvas bags, hemming work pants, or stitching saddles and harnesses. The tool saves your hands from the strain of forcing a needle through resistant material.

A sewing awl has a handle, a shaft, and a pointed tip. The tip is either straight (for general work) or curved (for reaching into tight spaces). Most awls sold for home use are straight-tip models, which work for nearly all repairs.

Key Takeaways

  • A sewing awl punches a hole through thick material before you thread a needle through it, protecting both your hands and your needle from damage.
  • Mark your stitch line with chalk or a pencil before you start, and space your holes evenly so the finished seam looks straight and holds securely.
  • Push the awl straight down with steady pressure rather than twisting it, and pull it straight back out to avoid enlarging the hole.
  • Thread a blunt needle (also called a tapestry needle) through each hole after you make it, using waxed thread or heavy-duty thread for durability.
  • Practice on scrap material first to get a feel for the pressure needed and the spacing that looks right for your project.

Preparing your material and marking the stitch line

Before you punch any holes, lay your material flat on a hard surface. A wooden cutting board, a thick piece of plywood, or a leather mat works well. Do not use a soft surface like a bed or carpet—the awl will sink into it and the hole will come out uneven.

Mark your stitch line with chalk, a pencil, or a fabric marker. For a straight seam, use a ruler or a straightedge. For curved seams (like the edge of a patch), trace along the edge with a pencil. The marks do not have to be perfect—they are just a guide so your holes stay in a line.

Decide how far apart your holes should be. For most repairs, holes spaced one-quarter inch apart create a tight, durable seam. For decorative stitching or lighter materials, you can space them one-half inch apart. Mark the exact spots where you will punch, or straightforward estimate as you go once you have done a few.

Punching holes with steady pressure

Hold the awl upright in your hand with your fingers wrapped around the handle. Your grip should be firm but not tense—imagine holding a pencil you are about to write with. Position the tip at your first marked spot, perpendicular to the material (straight up and down, not at an angle).

Push down with steady, even pressure. Do not twist the awl or rock it side to side. The tip should cut through the material cleanly. For thin leather or canvas, one smooth push is enough. For thicker material, you may need to push, then wiggle the awl slightly to work it deeper, then push again. Stop when the tip comes through the back side.

Pull the awl straight back out. Do not twist it as you withdraw it—twisting enlarges the hole and weakens the seam. Once the awl is out, move to your next marked spot and repeat. Keep your spacing consistent so the finished seam looks even.

Choosing and threading the right needle

Use a blunt needle (also called a tapestry needle or upholstery needle) rather than a sharp sewing needle. A blunt needle has a rounded tip that slides through the hole you have already made without catching or splitting the material. Sharp needles are designed to pierce fabric on their own and will bend or break if you force them through a pre-made hole in thick material.

Blunt needles come in different sizes. A size 18 or 20 works for most leather and canvas repairs. If your holes are very large, go up to a size 16. If they are small, a size 22 will fit better. The needle should slide through the hole with a little resistance—not so tight that you have to force it, but not so loose that it falls through.

Thread the needle with waxed thread or heavy-duty thread. Waxed thread resists fraying and holds knots better than regular sewing thread. For leather, use thread rated for leather work. For canvas or upholstery, any heavy-duty thread works. Cut a length about as long as your arm, thread it through the needle, and tie a knot at the end.

Stitching through the holes

Once all your holes are punched, thread your needle and start at one end of the seam. Push the needle through the first hole from one side, then pull it all the way through until the knot stops it. Move to the next hole and push the needle through from the opposite side (if you went down through the first hole, go up through the second). This creates the classic over-and-under stitch that holds the seam together.

Keep your stitches tight but not so tight that you pucker the material. Pull the thread snug after each stitch, but do not yank it. If the material starts to bunch or wrinkle, you are pulling too hard. Work your way along the seam, keeping the thread tension even.

When you reach the end, push the needle through the last hole and pull the thread to the back side. Tie a knot close to the material, then push the needle back through the last hole and out through the thread itself to hide the knot inside the seam. Trim the excess thread.

Common mistakes and how to avoid them

The most common mistake is twisting the awl as you pull it out, which enlarges the hole and weakens the seam. Push straight down, wiggle if you need to go deeper, then pull straight back. No twisting.

Another mistake is spacing holes unevenly. This makes the seam look sloppy and can leave weak spots. Mark your holes before you start, or count your pushes so you stay consistent. After a few seams, you will develop a feel for the right spacing and can estimate without marking.

Using the wrong needle is also common. A sharp sewing needle will bend or break in a pre-made hole. Always use a blunt needle. If your needle keeps bending, your holes may be too small—try a larger awl or punch the holes deeper so they go all the way through.

Practicing on scrap material first

Before you repair something you care about, practice on a piece of scrap leather or canvas. Punch a few holes, thread a needle, and stitch a seam. This teaches you how much pressure to use, how to keep your holes in a line, and what the finished stitch looks like. It also shows you whether your needle and thread are the right size for your material.

Scrap practice also helps you figure out the right hole spacing for the look you want. Some people prefer holes close together for a tight, formal seam. Others like them farther apart for a looser, more rustic look. There is no single right answer—it depends on the repair and your preference.

Frequently Asked Questions

Can I use a sewing awl on all types of leather?

A sewing awl works on most leather, but very thick leather (like sole leather on boots) may require a heavier awl or a mallet to drive it through. Thin, soft leather like suede or lambskin can be damaged by the awl—test on a hidden spot first. For delicate leather, consider taking the item to a leather repair shop.

What is the difference between a straight awl and a curved awl?

A straight awl works for most seams and repairs. A curved awl is designed for reaching into tight spaces, like the inside of a shoe or the corner of a bag. For general home repairs, a straight awl is all you need. Curved awls are more specialized and cost more.

Do I have to use waxed thread?

Waxed thread is stronger and resists fraying, so it is the best choice for leather and heavy materials. Regular sewing thread works in a pinch, but it frays more easily and knots are less find. For a repair that will last, waxed thread is worth the small extra cost.

How do I know if my holes are spaced right?

Holes spaced one-quarter inch apart create a tight seam that looks professional and holds well. If you space them farther apart, the seam is looser and the material between holes can flex. For repairs on items that get heavy use (like work boots), keep holes closer together. For decorative stitching, you can space them farther apart.

What should I do if I punch a hole in the wrong spot?

If the hole is in the wrong place, you can usually just ignore it and punch a new hole in the right spot. The extra hole will close up slightly once you remove the awl and will not be visible once the seam is stitched. If you are worried about it, you can fill it with leather glue or fabric glue before stitching, though this is rarely necessary.