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RONSTANConstrictor® Rope Clutches

Prices from $213.99 - To $233.99


Fulfilled from vendor
Model # 14487409 | Mfg # CT310P001UPC # 3700398208312


Product Overview

Ronstan's Constrictor® is a unique, ultralight, simple and strong rethink of the old-school rope clutch.

The new generation in rope clutches! Unlike conventional clutches, the Constrictor® system does not crush the rope between two metal surfaces. Instead, the loaded rope is securely held in a textile sock, which is locked securely between a titanium ring and an anchor base. 

The line runs freely through the sock in one direction, but is gripped instantly within the sock when running out in the opposite direction. Pulling on an SK-75 Dyneema® lanyard retracts the sock and releases the line.

  • Stronger and lighter: Constrictor is stronger, with twice the holding power of conventional clutches; three times lighter, saving weight and increasing performance; with no line abrasion or rupture; can be released easily under load without the use of a winch; and can be remotely released by extending the Dyneema® lanyard. Winner of the 2011 DAME Award and 2012 Pittman Innovation Award.
  • Non destructive: The textile sleeve closes like a constrictor on the line. The extraordinary grip is the result of fiber-to-fiber contact that is far less aggressive than a traditional metal cam, and much more effective.
  • Releases easily under load: The line can quickly be released under load without the use of a winch simply by pulling the lanyard.
  • Structural integration: The Constrictor is also available in a version suitable for structurally integrated installations. Instead of the notched alloy base unit, the sleeve is supplied with an alloy mounting collar that can be built into a suitably reinforced bulkhead of a customized base fitting.
  • Remote release: The Dyneema® lanyard can be extended for remote release; for example, to lock a halyard or reefing line to reduce spar compression and minimize rope creep.

Key Features

  • Two times the holding power of conventional rope clutches
  • Three times lighter than the conventional rope clutches
  • No point loading, abrasion or rope cover rupture
  • Easy to release when under load
  • UV resistant black Technora® aramid sleeve
  • SK75 Dyneema® release halyard

Constrictor® Rope Clutch Selection Chart

ClutchLine DiameterAnchor Base DimensionsLength of SockBreaking Load (lb.)
Constrictor 6 (1/4")3/16"-1/4"1"W x 4 9/16"L x 4 1/2"H17 11/16"1,010 (3/16"); 2,600 (1/4")
Constrictor 8 (5/16")1/4"-5/16"1"W x 4 9/16"L x 4 1/2"H19 11/16"1,350 (1/4"); 4,050 (5/16")
Constrictor 10 (3/8")5/16"-3/8"1"W x 4 9/16"L x 4 1/2"H19 11/16"3,150 (5/16"); 4,720 (3/8")
Constrictor 12 (1/2")3/8"-1/2"1 3/8"W x 4 15/16"L x 5"H25 5/8"3,370 (3/8"); 7,870 (1/2")
Constrictor 14 (9/16")1/2"-9/16"1 3/8"W x 4 15/16"L x 5"H25 5/8"4,050 (1/2"); 9,780 (9/16")


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