Simpson Strong-Tie 9 x 1-1/2 Wood Connector Screw #9 x 1.5" Tested and approved for use in many of our best-selling connectors for both interior and exterior applications Ideal for use in connector applications where more control is desired or using a hammer is inconvenient Shank is specifically designed to match the fastener holes in Simpson Strong-Tie connectors Patented serrated threads and sharp point make driving easy