Mungo Premium Grade MU Multi-Functional Nylon Plug Wall Anchors are premium Swiss Quality anchors made from high-grade polyamide PA6. MU multi-functional nylon plug anchors are appropriate for use with drywall, brick, concrete, and particle board. Additionally, MU multi-functional nylon plug anchors are self-tensioning and are particularly suitable for cavities. MU multi-functional plug anchors can be used for indoor and outdoor applications in temperatures ranging from -40 degrees fahrenheit to 212 degrees fahrenheit.