Nice share of video
Metal detectors are primarily made up of the battery case, and electronic box on one end. The long handle or brace is the operator’s arm which you use to search and detect metal targets underground. The insulated wire then extends from the box, then wraps into the shaft, which connects to the round disk which is the coil. This disk is actually covered by
a shield (sometimes plastic made) which is then attached to the handle’s shaft at a certain angle. This position allows you to hold the search device parallel to the surface.