Flails: Typically, flails clear an area by rotating a steel shaft with chains affixed to the shaft and "hammers" attached at the end of each chain. When the "hammers" contact landmines, the intended result is a detonation, though the landmine may simply be broken apart and its components scattered throughout the area, creating a hazardous byproduct. Effective depth of clearance by a flail is about one foot. Flails have been proposed as a tool for landmine neutralization since early in World War II. They can be effective in breaching operations, but none have proven very useful in humanitarian demining.

The Keiler, developed for the German government, is attached to a tank chassis (most commonly, the US M-48A2). One of the two prototypes developed is currently in use by units of the North Atlantic Treaty Organization's Stabilization Force in the former Yugoslavia. In March 1994, the developer, MaK System GrnbH, was contracted by the German government to produce 24 keiler landmine clearing vehicles. The clearing speed is advertised at up to four kilometers per hour. Replacement of the clearing 'hammers' is necessary after about 3000 meters clearance in medium to heavy soil. When offered to the US for use in Operation Desert Storm, the cost fo the two prototypes was reported as $2 million, not including the tank to which the flail system is attached."

As to why the flail isn't more widely used, it might be because of the cost and perhaps the inability to navigate difficult terrain.