T. K. Excellent Heavy Duty Zinc Plated Steel Molly Bolt Hollow M8, M11, M13
They're heavy duty and can be used on internal & external locations.Notice that their function is to expand behind the wall and supported by the wall. Include:M8 22; M8 34; M8 46; M11 36; M11 50; M13 50;Cavity Interset Anchor.