The wheel pricker (approx. 23-27 cm) of the saddler has a toothed, exchangeable metal wheel that is placed in a U-shaped bracket; the slightly curved shaft is fixed in a wooden handle. The teeth are wedge-shaped and placed at an oblique angle (45 °) to the circumference of the wheel.
It is used to mark and partially penetrate the leather before sewing. This makes it easier for the needle to pass through and ensures an even distance between the stitches.
For the same purpose, a chisel with a flared, similarly toothed blade can also be used.