Officemate Universal Partition Hanger Set, Adjusted to fit panels with 1 1/4 inch to 3 1/2 inch thickness, Metal Black (21460) Suitable for OfficemateOIC wall files, other brands of wall files with keyhole opening, or Verticalmate file pockets Shorter side fits panels up to 1 1/2 inch thick Use the longer side to fit panels up to 3 1/2 inch thickness Tighten the screw to the desired thickness Wall files attach securely over partition top