Stanley Proto FM-76.13 Facom Angled Open-Socket Wrench - 12 Point x 6 Point 13 mm Wrench, Angled Open-Socket 12 Pt x 6 Pt 13 mm Satin finish. Angle and through-hole design helps accommodate threaded rods or a bar for extra leverage, without affecting wrench strength. Deep recess at one end and open-end socket at the other fit over protruding studs.