Features: 1.Durable Material: All parts are made of heavy duty steel, suitable for escape rope safety rope fixing. 2.Multifunctional: Eye hook expansion screw set can be installed in various masonry, solid concrete, bricks or blocks. 3.Strong Bearing: Tripod bracket hooks and screws can bear a maximum load of 25KN. 4.Uniform Strength: The triangular shape bears the force uniformly, and the bottom groove makes the stress point close to the wall, which can be kept for a long time for use. 5.Demension: The expansion screw diameter is 12mm and the length is 98mm. A 12mm drill bit is required for installation and drilling. Specification: Item Type: Expansion Screw Eye Plate Set_x000D_ Material: Steel_x000D_ Purpose: Rescue, escape_x000D_ Pull Force: 25KN_x000D_ Expansion Screw Size_x000D_ Diameter: Approx. 12mm/0.47in_x000D_ Length: Approx. 98mm/3.86in PackageList: 1 xSafety Screw Bracket 3 x Expansion Screw