Everflow Sammy screws all thread anchor designed for wood applications. Easy, fast install with no pre drilling required. It ensures a strong hold between screw and connector. Hardened steel prevents snapping during installation. These fastener are designed for use in wood and feature a 1/4 x 2 inch screw length with threads for 3/8 inch rod. It is made up of steel with zinc coated. Quick to install using any Hexagon driver. Ul and FM tests were performed in compliance with NFPA 13 standards. <br><br>Note: use with safety glass which is recommended accessory for on-site labor and staff rohs compliance warning: do not use in vibratory zone.