Ultracycle Storage Hooks 2 wood screw type hooks per package. Drywall hardware included. Oversized hooks for large MTB tires and tall aero rims, with inside width of 75mm (2.95") and 150mm (5.9") tall inside the J-bend. The Ultracycle Storage Hooks are made from 9.5mm wire. Wood screw thread is nominally 11.4mm outside diameter (15/32") with 7 threads per inch. Use a minimum of 11/32" drill size to pilot wood hole. The Park Tools wood thread storage hook also features a black vinyl protective coating. Includes 2 wood screw type hooks per package.