Round knife

A round knife is a crescent or half-moon shaped blade with the sharpened edge running along the outer curve, held in the palm and rocked or pulled through leather rather than dragged flat like a straight utility blade. It is a traditional cutting tool used by leatherworkers and shoemakers for generations.

Its curved edge lets a skilled user cut both straight lines against a ruler and tight curves freehand with the same tool, simply by rolling the blade to change how much edge contacts the leather. That versatility is why many production leatherworkers reach for a round knife over a straight blade once they are comfortable with it, especially for pattern cutting and skiving.

A round knife needs regular honing and stropping to stay genuinely sharp, since a dull one drags and tears rather than slicing cleanly through leather, and it takes real practice to control safely. Beginners are usually better starting with a simpler rotary cutter or straight utility knife and moving to a round knife once basic cuts feel comfortable. A common mistake is trying to force a dull round knife through a cut instead of stopping to resharpen it.