Simpson CSD25312 1/4" X 3-1/2" Countersunk Head Split-Drive Anchor - Zinc, Pkg 100 Blue Concrete Screws Available in Type 305 or

Available in Type 305 or Type 316 stainless steel for superior corrosion resistance

Always follow Simpson Strong-Tie installation instructions

Drives Fast with No Pre-Drilling – Saves time and effort thanks to the sharp tip and aggressive threading

To avoid the possibility of corrosion

Self-drilling point eliminates the need for predrilling into steel

Simpson CSD25312 1/4" X 3-1/2" Countersunk Head Split-Drive Anchor - Zinc, Pkg 100 Blue Concrete Screws Available in Type 305 orThe Split Drive anchor is a one piece expansion anchor that can be installed in concrete, grout filled block and stone. As the anchor is driven in, the split type expansion mechanism on the working end compresses and exerts force against the walls of the hole. The Countersunk head allows for a smooth surface when attaching wood or light gauge steel to concrete and grout filled block surfaces. Installation: For Common Rafters: Drill a hole in base