GRK Fasteners No. 20 X 6 in. L Star Washer Head Structural Screws 20 pk

The screws are using self tapping specially hardened steel screw, W-Cut thread design as zip tip, climatek coated, sharp threads and points to built in washer for interior or exterior use and its ideal for use in anchoring to concrete or wood to concrete applications including basement framing and sheds.