General description Protective sleeves made of high-quality 316 stainless steel, super durable, with anti-corrosion and anti-rust functions. These stainless steel protective grommets can prevent the cable from wearing out in the post and maintain proper tension of the cable railing over time. Technical specifications Sleeve length: 0.78" Sleeve inner diameter: 0.21" Socket outer diameter: 0.275" Flange diameter: 0.47" Installation You don't need to use any adhesive; the railing cable can easily pass through the hole. It is recommended to use the included drill bit to drill holes. Usage Widely applied for wood posts, deck railings, stair railing handrails, etc.