The Easy Hand Underpinner is a very simple but well engineered mechanism for inserting one underpin (V-Nail) at a time. The wedge (V-Nail) sits square on the magnetic tip of the plunger and stays there as you push it in to the moulding. The moulding must be securely clamped, to stay together as the wedge (V-Nails) is driven in. Designed to work with the easiest moulding vice. The combination of these two economical machines make excellent joints of the moulding with the aid of V-nails.