Invisible - These invisible swage threaded stud tension end fitting terminal can be hided in the post for pretty apprearance.Be fit for both wood and metal post Marine Grade - This invisible cable railing kit is made of 316 stainless steel, super strong resistance to rust,water and corrosion.Excellent for both outdoor and indoor applications COMPABILITY:Those invisible end terminals deck railing hardware are for 1 or 8inch wire rope cable railing system,Swage Threaded Stud includes washer and lock nut This deck railing hardware fits 1 or 8-inch OD cable of railing system,The invisible hand swage tensioners were designed for wood,steel,aluminum post on deck railing,pilot hole size = 1 or 8 inch,hole to drill=1 or 4 inch Name:Invisible Threaded Terminal Studs Material:316 Stainless Steel Color:Silver Size:108mm Package Contents: 20pcs x threaded terminal studs 1pc x wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.