Simpson CSD25212 1/4" X 2-1/2" Countersunk Head Split-Drive Anchor - Zinc, Pkg 100 Stainless Steel Large Diameter Concrete Screws Featuring a paddle-style drill point

Featuring a paddle-style drill point that penetrates dense wood without predrilling

Use with compatible auto-feed screw guns for best performance

Blocking or bracing connections

Versatile Application: Intended for use with 6x6 lumber with a slotted base for adjustable installation

The Simpson CCQ86SDS2

Simpson CSD25212 1/4" X 2-1/2" Countersunk Head Split-Drive Anchor - Zinc, Pkg 100 Stainless Steel Large Diameter Concrete Screws Featuring a paddle-style drill pointThe 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