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Ronstan Constrictor Textile Single Rope Clutch

  • Line Size: 12 mm (1/2")
  • Breaking Load: 6720 lbs.
  • 3x Lighter and 2x the Holding Power of Conventional Rope Clutches
  • Item #: 
    Model #: 
    Shipping Weight: 
    0.80 Lbs.
    List Price: 
    Status:      In Stock



    Ronstan Constrictor® Textile Single Rope Clutch


    • Unique textile sock closes like an octopus on the line, providing effective load distribution and outstanding grip for minimized line wear
    • Constrictor effect provides increasing holding power as load increases
    • 2x the holding power and at least 3x lighter than conventional rope clutches
    • Line can be quickly and easily released under load without the need for a winch, simply by pulling control lanyard
    • Control lanyard can be extended to provide remote release, making it ideal for applications such as masthead-mounted halyards to eliminate mast compression loads and halyard creep


    • Ronstan Model No. CT312P001
    • Line Size (rope diameter): 12 mm (1/2")
    • Breaking Load: 6270 lbs
    • Materials:
      • Housing / Base: Anodized Aluminum
      • Bi-conical Insert: Titanium
      • Sock: Aramid
      • Control Lanyard: Dyneema®
    • Dimensions: 58 mm H x 36 mm W x 126 mm L (2-9/32" H x 1-3/8" W x 5" L)
    • Length of Base + Sock: 776 mm (30-1/2")

    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to


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