ISC Twister SuperSafe Swivel Carabiner 27kN
ISC Twister SuperSafe Swivel Carabiner — 27kN MBS
The ISC Twister was purpose-built for one of arborist climbing's most persistent annoyances: twisted climb lines. Designed specifically for flipline and lifeline terminations, the Twister's integrated swivel allows your rope to rotate freely at the connection point, continuously relieving torsional buildup before it becomes a problem. Double locking gate for security you can count on at height. At just 5 oz with a generous 3/4" gate opening, it's a hardware upgrade that pays for itself in reduced rope management time every single day.
Key Features
- Designed specifically for flipline and lifeline terminations
- Integrated swivel eliminates climb line twist while working aloft
- Double locking gate for secure, reliable closure
- 3/4" gate opening for easy clipping with gloves on
- Lightweight aluminum construction at just 5 oz
- MBS: 27kN
Specifications
| Spec | Value |
|---|---|
| Material | Aluminum |
| Gate Type | Double locking |
| Gate Opening | 3/4" |
| Swivel | Integrated |
| MBS | 27kN |
| Weight | 5 oz |
| Vendor | ISC |
| Country of Origin | USA |
Frequently Asked Questions
What makes the ISC Twister different from a standard swivel carabiner?
The Twister was specifically engineered for flipline and lifeline terminations — applications where rope twist is most problematic. Its swivel geometry and double locking gate are optimized for these use cases, making it a more purpose-built solution than a general-purpose swivel carabiner.
What is a "SuperSafe" gate?
SuperSafe refers to ISC's double locking gate mechanism, which requires two distinct actions to open. This provides a higher level of accidental opening protection than a single-action gate, making it well-suited for critical connection points on fliplines and lifelines.
Can I use the Twister on my climbing saddle connection?
Yes. The Twister is commonly used at the saddle bridge or dorsal D-ring connection on both fliplines and climbing lines, where its swivel action is most effective at preventing rope twist during movement through the canopy.
How does the 3/4" gate opening help in the field?
A 3/4" gate opening is wide enough to clip easily while wearing work gloves, reducing fumbling and speeding up rigging changes when you're working aloft. It also accommodates a wider range of rope diameters and hardware configurations.
How does the Twister compare to the US Rigging Tri-Act Swivel Carabiner?
Both are aluminum swivel carabiners designed to prevent climb line twist. The ISC Twister is purpose-designed for flipline and lifeline terminations with a double locking gate and slightly higher MBS (27kN vs 25kN), while the US Rigging Tri-Act uses a triple-action gate. Choice often comes down to personal preference for gate mechanism and brand.