The Original · Patented · Made in USA
Home of the Original
Resistance Band Collar Hooks.
Secure any resistance band to any bar. Heavier loads, safer reps, zero slippage — from the inventor and patent-holder of the resistance band collar.
- 4US Patents
- 1″–2″Bar Sizes
- X3 / HarambeCompatible
- $39.99Intro Price
The 2-minute overview
Everything you need to know about resistance band collars & hooks.
How we solved connecting any band to any bar — and what makes the original different from every imitation.
NEW · Fusion Collar Hooks
Three collars. One system.
The rtHook is now welded directly to the ChainBeast collar — faster setup, zero loose hardware. Pick the size that matches your bar.
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Best Seller
Fusion PRO XL
Heavy-duty 2″ Olympic compatible. Dual anchor points, max load capacity.
Shop PRO XL → -
Why athletes choose F2
Built for serious training. Trusted by inventors.
Secure fit
Lock heavier. Train safer.
Snug, non-slip grip on any barbell. Your bands stay locked through the heaviest, most explosive sets — no drift, no readjusting mid-rep.
- Industrial-grade steel construction
- Rated for 4″-wide resistance bands
- Compatible with X3 Bar, Harambe & every major system
60-second setup
Clip on. Train. Done.
Quick-release design lets you switch bands or exercises in seconds. No tools, no fumbling — just clip the collar onto the bar and load up.
- Tool-free attach and release
- Welded rtHook on every Fusion model
- Travel-ready — fits in any gym bag
A full ecosystem
More than a collar.
Unlike imitations from Clench Fitness or Serious Steel, the ChainBeast is the heart of a complete training system — collars, hooks, handles, adapters and bars that all work together.
- Pairs with F2 Grasp Handles & RoarTators
- F2 Olympic Adapters extend compatibility
- Custom color options available
The origin story
How the resistance band collar got invented.
From a pandemic garage workshop to four US patents — the real history of F2 Training System.
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2016
Before the ChainBeast — the ALLN-1 Bench & Bar
I'd invented the ALLN-1 Functional Fitness Bench for resistance-band hip thrusts, curls and squats. But traditional bands didn't load heavy, and a 4-foot barbell cost more to ship than it was worth. Back to the drawing board.
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2019
The ChainBeast Collar & F2 Olympic Adapters.
After months of trial-and-error, I built the 3-piece ALLN-1 Bar — but it had no holes for resistance bands. The fix: collars that fit onto any bar with eyebolts to anchor bands. That became the ChainBeast. For non-Olympic bars, I added the F2 Olympic Adapters.
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2021
VRS Clips & the F2 rtHook prototype.
Tube bands weren't strong enough and didn't fit well. So I developed the VRS Clips for adjustable tube/flat band resistance, then a dedicated flat-band hook — the F2 rtHook — to lock bands cleanly to any bar.
Today we ship resistance band collars from split to fusion models, 1″ to 2″ — all built on the same core idea: securely attach resistance bands to any bar, for a better workout.
The complete system
One platform. Every exercise.
The F2 Training System is the original all-in-one modular fitness solution. See how every piece fits together.
Questions
Frequently asked.
What bars are these resistance band collars compatible with?
Our collars fit all standard barbells and major fitness systems including the X3 Bar and Harambe Bar.
How secure are the collars during heavy workouts?
The industrial-grade steel construction ensures a tight, non-slip grip on any barbell, providing maximum security during your workout.
Can I use these collars with any resistance bands?
Yes — our ChainBeast and VRS collars work perfectly with resistance bands up to 4″ wide.
Can these collars be used as resistance band handles?
Yes — our ChainBeast PRO and ChainBeast PRO XL pair with our F2 Grasp Handles to function as resistance band handles. Watch the demo →
Can I get my collars in custom colors?
Yes — we offer custom color options for many of our F2 Training System products.
Introductory price · ships fast
Lock your bands.
Load heavier. Train harder.
Get the original ChainBeast Fusion Resistance Band Collar Hooks.
Shop now — $39.99US Patents · Industrial-grade steel · Custom colors available