Magnetic plumb bob

Masonry pawn weighing 400 g, suspended on a 6 m long line. The cassette is equipped with a automatically rolling cable mechanism, a very strong magnet used for fastening the vertical to metal structure elements and a sharp marrow, facilitating attachment on wood or other building materials. In the body there is a hole for easy to hang the vertical on the concrete walls /after hammering nails /. The solutions used cause a clear shortening of the pendulum stabilization time.