Heavy Duty Reinforced Plastic Wall Plug Nylon Anchor High Load Expansion Insert for Solid Wall Concrete Mounting Product Description The Heavy Duty Reinforced Plastic Wall Plug is designed for high-load solid wall applications requiring superior pull-out strength and deformation resistance. The plug body is molded from reinforced nylon PA6 with a thickened collar and body wall section, providing substantially higher expansion force compared to standard light-duty wall plugs