How Viewrail's Hidden Fasteners Work
Learn how Viewrail's hidden fastener kits work — from Level Tension to DriveTite — and how each one keeps cables tensioned cleanly inside the post.
One of the first things people notice about Viewrail cable railing is what they don't see: no bulky hardware sticking out of the posts, no exposed bolts, and no fittings interrupting the view. Every Viewrail cable system is engineered so the tensioning and anchoring hardware lives inside the post, keeping your sightlines completely clear.
Here's how it works and how to know which kit applies to your project.
If you need the full system overview first, start with What is Cable Railing?.
Why Hidden Fasteners?
Traditional cable railing hardware is functional, but it's not pretty. Exposed fittings can protrude several inches from the face of a post, cluttering the clean horizontal lines that make cable railing worth choosing in the first place.
Viewrail solved this by designing fastener systems that work entirely inside the post. The posts themselves come pre-drilled to accept the hardware, so there's no guesswork during installation — you mount the posts, run the cable, and the tensioning hardware disappears inside.
If you are still choosing post types or mounting conditions, see What Cable Railing Post Mounting Styles Are There?.
The result is a railing that looks as refined outdoors as it does inside. That's a higher standard than most cable railing manufacturers hold themselves to.
The Hidden Fastener Kits
Viewrail offers four distinct hardware kits, each designed for a specific situation. Understanding which kit does what will help you plan your project correctly.
Level Tension Kit
The Level Tension Kit is the workhorse of any straight, horizontal cable run. It anchors and tensions one end of a cable wire from inside the post. No hardware is visible from the outside.
Each kit contains three components:
Tension Receiver — accepts the fitting and allows you to dial in tension
Threaded Crimp Fitting — crimped onto the end of the cable wire
Adhesive Sleeve — provides a clean finish at the post face
You'll need one kit per cable, per tensioning end. For a 36" post with 10 cable runs, that's 10 Level Tension Kits at each end post. Viewrail's 5/32" 316 stainless steel cable is used with this system.
Note: The Level Tension Kit only works with Viewrail's metal posts. For wood posts, see DriveTite below.
Angle Tension Kit
The Angle Tension Kit works the same way as the Level Tension Kit, but it's designed for stair and angle applications where the cable runs on a slope rather than a level plane.
The key differences from the level version:
Includes an Angle Washer that sits on the back side of the post to accommodate the cable's entry angle (select the washer that matches your stair pitch)
Uses an Adhesive Sleeve with a beveled interior diameter to provide extra cable clearance at the angle
Each kit contains:
Tension Receiver
Threaded Crimp Fitting
Angle Washer (angle-specific)
Angle Adhesive Sleeve
Like the Level Tension Kit, this is a metal-post-only system. DriveTite handles angled wood-post installations.
Inside Post Mount Kit
The Inside Post Mount Kit solves a problem that most cable railing manufacturers handle poorly: corners.
In a typical cable railing system, turning a 90° corner requires two posts — one to terminate the first run and one to start the perpendicular run. The Inside Post Mount Kit lets you do it with a single post, keeping the cables on the same plane and saving you both cost and visual bulk.
Here's how it works: the Termination Washer and Cable Stop are inserted diagonally through a 5/16" hole in the post, then rotated 90° so they lock against the inside wall. Once tension is applied at the other end of the run using a Level or Angle Tension Kit, the hardware pulls tight and stays put, entirely out of sight.
Each kit contains:
Termination Washer Fitting
Cable Stop
Adhesive Sleeve
Important: The Inside Post Mount Kit provides no tensioning ability on its own. Every run that uses this kit at one end must use a Level Tension Kit or Angle Tension Kit at the other end to keep the cables taut.
DriveTite Kit
DriveTite is Viewrail's solution for wood posts, whether you're working with brand-new posts, existing posts you want to keep, or a framed wall structure.
If you're still deciding between wood and metal posts, see Wood vs Metal Railing Posts: Which Is Better for Cable Railing?.
Instead of threading hardware through a hollow metal post, DriveTite fastens into the face of the wood post using a small pilot hole. The tensioning components are then concealed inside a slim stainless steel cylindrical cover, giving wood-post systems the same clean look as the metal post systems.
DriveTite comes in two versions:
Level Kit — for horizontal cable runs. Each kit includes:
Receiver Screw
Threaded Crimp Fitting
DriveTite Turnbuckle
DriveTite Receiver
DriveTite Cover
Angle Kit — for stair and angled cable runs. Each kit includes:
Threaded Crimp Fitting
DriveTite Angle Mount
DriveTite Angle Receiver
DriveTite Angle Set Screw
DriveTite works with solid wood posts at least 2½" thick. All components are manufactured from marine-grade 316 stainless steel. It's compatible with 5/32" cable and pairs with both the Signature and Express cable systems.
How the Kits Work Together
Most cable runs involve at least two posts: a start and an end. The hardware you choose at each end determines how the tension is managed across the span.
A typical level run might look like this:
Post A (end post): Level Tension Kit — applies and adjusts tension
Post B (end post): Level Tension Kit or Inside Post Mount Kit — anchors the other end
A stair run might use:
Post A: Angle Tension Kit
Post B: Angle Tension Kit or Inside Post Mount Kit
Corner transitions use:
Corner post: Inside Post Mount Kit on the terminating run, Level Tension Kit on the starting run — all within the same post
This is the detail that sets Viewrail apart from most other cable railing brands. The ability to manage a 90° corner in one post, with all hardware hidden inside, is a direct result of how the post holes and kit geometry are engineered together.
What You'll Need for Installation
All cable railing systems use Viewrail's 5/32" 316 stainless steel, 1×19 cable. The 1×19 construction means 19 individual wire strands wound into a single cable. It's durable, holds tension well, and has a smooth, consistent surface that makes crimping clean and precise.
You'll also need a Cable Rail Installation Kit, which includes the specialized tools required for cutting and crimping the cable. The crimp fitting won't seat properly without the right crimper, so don't skip it.
For DriveTite installations, Viewrail offers a dedicated DriveTite Installation Kit with the tools matched to that system.
For the full install sequence, see How Do I Install a Cable Railing System? and Is DIY Cable Railing Installation Worth It?.
Related topics
What is Cable Railing? — Learn how posts, cable, and hardware work together.
What Cable Railing Post Mounting Styles Are There? — Match your hidden fastener setup to the right post mount.
Wood vs Metal Railing Posts: Which Is Better for Cable Railing? — Decide when to use metal-post kits or DriveTite.
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