Safety Wooden File Handle. A split file handle can cause a serious industrial accident. Kennedy safety handles are rapidly becoming standard equipment in workshops. Firmly secured inside each handle and covered by a ferrule is a steel spring. This combination absorbs the pressure when the tang of the file is driven into the handle, preventing splitting or cracking. Once properly inserted the tang of the file is held in a vice-like grip that under normal use is virtually impossible to remove, unless the handle is deliberately broken. Features and Benefits • Highly durable - almost impossible to split or crack • Keeps files firmly held in place with a vice-like grip