 Many of the bolines advertised in on-line "magick shops" have a characteristic crescent shape, and are described as being for harvesting herbs.This crescent shape is reminiscent of the sickle described in the Key of Solomon, a medieval grimoire and one of the sources for modern Wicca.Confusingly, an Italian version of the Key of Solomon has a hook-shaped knife called an "artauo" (a possible root for athame) and a straight, needle-shaped blade called a "bolino".