Simpson CD25112M 1/4" X 1-1/2" Mushroom Head Crimp Anchor - Zinc, Pkg 100 Large Diameter Concrete Screws Use a #3 Phillips driver

Use a #3 Phillips driver bit for optimal installation

these screws are built for exterior use in demanding environments

Box-thread design – Smooth driving with reliable holding strength

full round head

reliable fastening without the need for pre-drilling

Simpson CD25112M 1/4" X 1-1/2" Mushroom Head Crimp Anchor - Zinc, Pkg 100 Large Diameter Concrete Screws Use a #3 Phillips driverThe Simpson Strong Tie Crimp Drive anchor is an easy to install expansion anchor for use in concrete and grout filled block. The pre formed curvature along the shaft creates an expansion mechanism that secures the anchor in place and eliminates the need for a secondary tightening procedure. This speeds up anchor installation and reduces the overall cost. The low profile mushroom head works excellent for attaching wood or light gauge steel to concrete