always know where you flashlight be with these handy clip . Works on most `` d '' cell flashlight in either the horizontal or vertical position . one clip be sufficient for a 2-cell flashlight . I keep one one the wall by the garage door so I always know where the flashlight be . it would work equally well in a car , truck , boat , or camper . I be think about mount one on my bike handlebars : -rrb-