Edge creaser

An edge creaser is a small tool, sometimes heated and sometimes used cold, with a grooved wheel or blade that presses a thin decorative line into the leather a short distance in from a cut edge. Some versions are simple hand tools pulled along a straightedge, while others are electric and heated for a crisper, darker line.

The creased line serves a mostly decorative role, framing an edge with a clean, deliberate detail that signals careful finishing work, though a heated creaser also lightly seals and firms the leather along that line. It is a common finishing touch on belts, wallet edges, and strap work, usually applied after cutting and before or after burnishing depending on the maker's process.

Keeping consistent pressure and speed while pulling the tool along the edge gives the most even line, since slowing down or pressing harder in spots leaves a wobbly or uneven crease. A heated creaser that runs too hot can scorch or over-darken thin leather, so testing temperature on scrap first is worth doing. A common mistake is creasing before the edge is fully finished, leaving the line accidentally sanded away during beveling or burnishing.