beam clamp 1.Universal malleable iron beam clmap 2.Size range:1/ ... /8-163surface finish:black,electro-z Light Duty Beam Clamp,Spring Steel Clamp 1.universal malleable iron beam clmap 2.size range ... ,3/8-163surface finish:black,electro-z 3.Color:black4.Jaw Opening: 3/4"5.Thread Impression:10-24 and 1 ... into beam surfaces to protect against slippage Light Duty Beam Clamp,Spring Steel ...