This is the infamous Hazet® 1966-2 Impact Pad Puller with 4mm prongs that the Porsche Workshop Manuals recommend but that no auto parts store has ever heard of. If the Porsche workshop manual recommends the use of the tool there is an excellent reason. From all our research, the Hazet 1966-2 is the only tool, we know of, that has the required 4mm diameter prongs which fit the holes in brake pads for Porsches. The tool doesn't require an air compressor. It functions as a slide hammer.