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CMI Rope Jack

CMI Rope Jack

CMI Rope Jack



The CMI Rope Jack is a Mechanical Advantage tool for pre-tensioning static lines, light lifting and cabling. The Rope Jack is small enough and light enough to be carried aloft by a climber for Mechanical Advantage within the crown. The length of the handle on the Rope Jack limits excessive loading to avoid rope damage. The Rope Jack is designed to be used by only one individual using one hand only. Can be attached mid-line and can run virtually any length of rope. The MA is approximately 5:1 - no pulleys, no extra rope, minimum weight, minimum friction, quick, easy on-off, works well 'topside', too. Made in the USA.

Minimum Qty

1 Items

Order Ships in

1 Bus Days


In Stock

Product Code: 215-05001001

All prices include GST
  • The MA is approximately 5:1, no pulleys, no extra rope, minimal weight
  • Can accommodate lines from 10 - 16 mm
  • Easily attached mid-line and can run virtually any length of rope
  • Designed to be used by only one individual using one hand only
  • Approved for life support use as long as another form of progress capture device is used
  • 140 - 360 kg of force can be applied by a single operator
  • Releasing the Rope Jack will take a little practice
  • NOT to be used for heavy or dynamic loads
  • DO NOT USE A CHEATER BAR to increase leverage
  • Made in the USA
Rope Ø 10 - 16 mm
Handle Length 555 mm
Single Capacity 360 kg
MA 5:1
Weight 970 g

Under $250  
Auckland $6.90
North Island $9.90
South Island $12.90
Orders Over $250 FREE*


Due to factors out of our control, Treetools is experiencing random shipping delays and supply issues that may result in some gear not being available either in-store and/or online. We apologise for any inconvenience this may cause.

*Free Shipping excludes ladders and overweight product.

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All parcels require a signature on delivery unless requested otherwise.

Accurately tracking the life of a product is paramount for your safety

Due to the critical nature of gear stocked by Treetools, we cannot accept returns on safety equipment, so please choose carefully. Treetools cannot accept returns or exchanges on safety equipment because we need to ensure the gear you purchase is brand new, in a safe condition, and traceable directly back to manufacturers and suppliers. Please understand this equipment plays a critical role in your safety, potentially preserving your life when you climb or work aloft. Climbing and rigging equipment listed on these pages should only be used by suitably trained and qualified individuals.

What counts as work at height safety equipment?
  • Ascenders
  • Carabiners
  • Climbing Kits
  • Climbing Lines
  • Climbing spurs
  • Connectors
  • Descenders
  • Friction Cords
  • Friction Savers
  • Harnesses
  • Helmets
  • Lanyards
  • Pulleys
  • Rope Tools
  • Slings
  • Swivels
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