Leather strops are a type of sharpener used to hone and maintain the sharpness of knives, razors, and other cutting tools. They are made from leather and are usually attached to a handle or frame. Strops are often used in combination with a honing compound to help sharpen the blade. Strops are an essential tool for any sharpening job, as they help to keep the blade in good condition and prevent it from becoming dull.