Garelick/Eez-In 99180 Included With All Sport/Diver Series Ladders 1" (3Cm) Thick Poly Spacer 10 Degree Angle Lock And Stainless Steel Face Plate Mounting Bracket, Mounting Hole Diameter: 5/16" (1Cm) Included with all sport/diver series ladders. 1 (3cm) thick poly spacer 10 degree angle Lock and stainless steel face plate mounting bracket, mounting hole diameter: 5/16 (1cm)