Nylon Sleeve Hammer-Set Plastic Expansion Anchor Round Head Nail Fixing Plugs for Concrete Brick Block Wall Product Description The Nylon Sleeve Hammer-Set Plastic Expansion Anchor is a general-purpose fastening solution for concrete, solid brick, hollow brick, and block wall applications. This anchor features a high-strength nylon PA6 sleeve body with a pre-inserted zinc-plated steel nail and round countersunk head, designed for simple hammer-in installation in pre-drilled