Abstract: A training device for developing a golfers swing based on a principle of driving a spike fixed to the sweet spot of a striking surface of a golf club, into the flat target surface of a slab of material selected to permit penetration and fixation of the spike in the target surface. The slab is preferably styrofoam and is supported by a stake inserted through the slab and into the ground. In an alternative arrangement, the slab is temporarily supported in its erect position by inserting its lower end in a slot in a pad.