3/8" x 11", Zinc Turnbuckle Gate Hook, Designed For Heavy Warehouse, Grain Bin, Machine Shed Doors, Etc, After A Door Is Closed & Hooked, It Can Be Drawn Tightly Shut By Rotating Turnbuckle, Hex Shaped Body Allows For Ease Of Adjustment By Hand Or With A Wrench, Prevents Door Rattling, Boxed Loose.