A kaiser blade (also called a ditch bank blade, brush axe, or sling blade) is a heavy, hooked, steel blade at the end of a wooden handle usually to long, primarily used for cutting small- to medium-sized vegetation. It is double-edged, and both sides are usually kept sharp.
Although not actually depicted in the film Sling Blade, the term "sling blade" came into the pop culture lexicon as a result of its mention as an alternative name for a kaiser blade by Billy Bob Thornton's Karl Childers.