Beam Clamp, C-Clamp, Rod Size 1/2 In., Max. Load (Lb.) 400, Material Malleable Iron, Length (In.) 1-3/4, Metal Detectable Yes, For Attachment To W And M Beams, Includes Set Screw, Zinc Plated Finish, Standards Federal Specification A-A-1192A (Type 23), WW-H-171-E (Type 23), ANSI/MSS SP-69, and ANSI/MSS SP-58 (Type 23). UL, ULC Listed (Sizes 3/8 In., 1/2 In., and3/4 In.) and FM Approved (Sizes 3/8 In.).