Ronstan Constrictor® Textile Rope Clutch - Single 12mm Rope

Unlike all conventional clutches the Constrictor® system does not crush the rope between two metal surfaces. Instead, the loaded rope is held securely in a textile sock, itself attached to an anchor base. The rope runs freely through the sock in one direction, but is gripped instantly within the sock when running out in the opposite direction. This constrictor effect, provides increasing holding power as the load increases.
Stronger:
The standard Constrictor® range provides 2x the holding power of conventional rope clutches, and custom solutions are available with holding power up to the break load of the rope!
Lighter:
At least 3x lighter than conventional rope clutches.
No Abrasion or Rupture:
The unique textile sock closes like an octopus on the line, providing effective load distribution and outstanding grip; a result of fibre-to-fibre contact that is far less aggressive than traditional metal cams.
Safely Release Under Load:
The line can quickly and easily be released under load without the need of a winch, simply by pulling the control lanyard. This can be an important safety consideration in situations where immediate release is required.
Remote Release System:
The Constrictor® control lanyard can be extended to provide remote release, making it ideal for applications such as mast-head mounted halyard to eliminate mast compression loads and halyard creep.
Materials:
- Housing/Base: Anodised Aluminium
- Bi-conical Insert: Titanium
- Sock: Aramid
- Control Lanyard: Dyneema®
Specifications
Rope Ø: 1/2"
Height: 5"
Width: 1-3/8"
Length: 5"
Fastener Ø: 1/2"
Fastener Hole Centers: 2-3/4 - 3-1/2"
Breaking Load: 7,870lb
Weight: 11.6oz
- Product Name: Ronstan Constrictor® Textile Rope Clutch - Single 12mm Rope
- UPC Number: 3700398208329
- Shop by Brand: Ronstan

Welcome to the Everest Marketplace Seller Storefront, where we're on a mission to equip you with the gear that'll have you thriving in the great outdoors like a legendary Yeti. Whether you're into hunting, fishing, survival, or more, you've stumbled upon the right place!
Got questions about our products? Need to make a return or can't find what you're looking for? Reach out to us at 1-866-806-0934 or drop us a line at info@everest.com.
And hey, if you happen to be a seller with products listed under the Everest storefront, let's chat so we can match those items to your very own kingdom!
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Out of stock
We prioritize serving those who serve nature. Everest represents the boundless outdoors. Find out how we give back.
Ready to wrestle Yetis over prices? Everest is up for the challenge with our Price Match guarantee.
Shipping & Returns
All sellers will furnish tracking information for shipped products, whenever relevant. This tracking data enables you to keep tabs on the status of your shipment. If you purchase products from several sellers in one order, you will receive tracking information from each respective seller.
Following the dispatch of your order, Everest.com will send you an email notification containing the tracking details. Kindly ensure that the email address provided during the checkout process is accurate and up to date.
Returns are only accepted for products bought directly from Everest.com. To qualify for a return, the product must be unused, in its original condition, and with the original packaging intact. Some products may be exempt from the return policy. Should you wish to initiate a return, please reach out to the seller directly within 7 days from the date of delivery.
meet marcus

The Story of Marcus Moose
In the vast wilderness the Everest marketplace, a legendary customer service character emerged—Marcus Moose. With a passion for the outdoors rivaling even the mightiest Yeti, Marcus's mission was clear: guide people to embrace nature's wonders. Marcus, the guardian of adventure, ensured no one was left behind. The wilderness awaits, and with Marcus by your side, your wildest dreams are just a hoofstep away.
Shipping & Returns
All sellers will furnish tracking information for shipped products, whenever relevant. This tracking data enables you to keep tabs on the status of your shipment. If you purchase products from several sellers in one order, you will receive tracking information from each respective seller.
Following the dispatch of your order, Everest.com will send you an email notification containing the tracking details. Kindly ensure that the email address provided during the checkout process is accurate and up to date.
Returns are only accepted for products bought directly from Everest.com. To qualify for a return, the product must be unused, in its original condition, and with the original packaging intact. Some products may be exempt from the return policy. Should you wish to initiate a return, please reach out to the seller directly within 7 days from the date of delivery.
We prioritize serving those who serve nature. Everest represents the boundless outdoors. Find out how we give back.
Ready to wrestle Yetis over prices? Everest is up for the challenge with our Price Match guarantee.
meet marcus

The Story of Marcus Moose
In the vast wilderness the Everest marketplace, a legendary customer service character emerged—Marcus Moose. With a passion for the outdoors rivaling even the mightiest Yeti, Marcus's mission was clear: guide people to embrace nature's wonders. Marcus, the guardian of adventure, ensured no one was left behind. The wilderness awaits, and with Marcus by your side, your wildest dreams are just a hoofstep away.
Unlike all conventional clutches the Constrictor® system does not crush the rope between two metal surfaces. Instead, the loaded rope is held securely in a textile sock, itself attached to an anchor base. The rope runs freely through the sock in one direction, but is gripped instantly within the sock when running out in the opposite direction. This constrictor effect, provides increasing holding power as the load increases.
Stronger:
The standard Constrictor® range provides 2x the holding power of conventional rope clutches, and custom solutions are available with holding power up to the break load of the rope!
Lighter:
At least 3x lighter than conventional rope clutches.
No Abrasion or Rupture:
The unique textile sock closes like an octopus on the line, providing effective load distribution and outstanding grip; a result of fibre-to-fibre contact that is far less aggressive than traditional metal cams.
Safely Release Under Load:
The line can quickly and easily be released under load without the need of a winch, simply by pulling the control lanyard. This can be an important safety consideration in situations where immediate release is required.
Remote Release System:
The Constrictor® control lanyard can be extended to provide remote release, making it ideal for applications such as mast-head mounted halyard to eliminate mast compression loads and halyard creep.
Materials:
- Housing/Base: Anodised Aluminium
- Bi-conical Insert: Titanium
- Sock: Aramid
- Control Lanyard: Dyneema®
Specifications
Rope Ø: 1/2"
Height: 5"
Width: 1-3/8"
Length: 5"
Fastener Ø: 1/2"
Fastener Hole Centers: 2-3/4 - 3-1/2"
Breaking Load: 7,870lb
Weight: 11.6oz
- Product Name: Ronstan Constrictor® Textile Rope Clutch - Single 12mm Rope
- UPC Number: 3700398208329
- Shop by Brand: Ronstan

Welcome to the Everest Marketplace Seller Storefront, where we're on a mission to equip you with the gear that'll have you thriving in the great outdoors like a legendary Yeti. Whether you're into hunting, fishing, survival, or more, you've stumbled upon the right place!
Got questions about our products? Need to make a return or can't find what you're looking for? Reach out to us at 1-866-806-0934 or drop us a line at info@everest.com.
And hey, if you happen to be a seller with products listed under the Everest storefront, let's chat so we can match those items to your very own kingdom!
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