7/8", 2 Way, Tubular Steel Adjustable Overhead Storage Hanger, Create More Storage Space In Garage, Basement, Shed Or Attic, Length Adjusts 12-3/4" - 21" & 12" Arms Adjust To Any Beam Direction, Accomodates 10" Shelf, Holds Up To 50 LB, Non Slip, No Mar Foam Arm To ProtectValuable Items, Mounting Surface Should Be Solid Wood At Least 1" Thick & Strong Enough To Hold Intended Weight, Mounting Hardware Included, Dimensions: 1.91" L x 1.29" W x 1.08" H.