Product Details Fangrui Product Details Fit For 33-degree Stairs: These 33-degree Beveled Angle Washers Are Specifically Designed To Be Placed Between The Cable Railing Kit And The End Post On 33-degree Staircases. These Washer Holes Are 23/64inch (9mm) And Max For 5/16inch (8mm) Thickness Cable Railing Hardware Kit. They Can Be Used In Combination With Our 8mm Thick Terminals: B0cpkzzjrw Size Compatibility: Angle Washers Designed With An Inside Diameter Of 0.35inch (9mm), And An Outside Diameter Of 0.63inch (16mm). Which Are For An Invisible System Kit To Get A Professional And Finished Appearance Staircase Project. Marine Grade Sst316 Material: Our Beveled Angle Washers Are Made From Marine-grade Sst316 Material, Which Has Super Strong Ability On Rust Resistance And Corrosion Resistance, And Its Able To Resist Heavy Weather. Easy Installation: These Washers Are Designed For Beveled Angles, And Will Not Get Deformed Easily Thanks To Their Sturdy Structures. Additionally, They Are Extremely Beginner-friendly And Can Be Easily Installe