Grating Clip, G-Clip, Carbon Steel, Galvanized Finish, Fits Bearing Bar Height 1 In, Fits Bearing Bar Spacing 1 In, Fits Support Structure Thickness 3/4 to 1 1/4 In, Fits Grating Opening Size 1 In, Meets/Exceeds ASTM B-695, Fastens Grating To A Horizontal-Facing Steel Structural Member Edge, Includes 1/4-20 Hex Head Cap Screw, Package 50