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CMC CAPTO with FREE Mainline Rescue Systems e-Course


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Gain the Advantage

CAPTO is an intuitive device that combines a multi-functional rope grab, high-efficiency pulley, and integrated becket for easy hauling and ascending. Built around an innovative V-groove Cam, CAPTO is designed to handle rescue loads while providing force-limiting overload protection. CAPTO is available in gray for 10.5-11 mm (7/16 in) rope and red for 12.5-13 mm (1/2 in) rope. Both models are certified to NFPA General Use and the 11 mm CAPTO is also certified to EN 12841:2006/B (200 kg – two-person rescue load rating), EN 567:2013, and EN 12278:2007 (36 kN).

Compact, versatile, and easy to use, CAPTO is well-suited to a multitude of technical applications in personal and team-based systems for rescue and rope access. It replaces multiple devices in one, streamlining training and operations. Through its combination of features and built-in force-limiting capabilities, CAPTO provides technicians with a greater degree of safety and efficiency for hauling and ascending.

More about CAPTO

CAPTO installs quickly and easily on tensioned and un-tensioned lines, and is designed to be used one-handed. The double-action side plate protects against accidental opening and moves the cam out of the rope path to facilitate rigging. Both the rope grab and pulley are immediately accessible, making it possible to build a 3:1 haul system in a single motion without using knots, hitches, or additional equipment. Compared to a traditional 3:1 involving a G-Rated rope grab, pulley, and carabiner; CAPTO is faster to install, lighter weight, and half the length. Its compact size maximizes the haul field and reduces the number of resets. Adding more mechanical advantage is simple and straightforward. CAPTO smoothly progresses from a 3:1 to a 5:1, and works well in combination with piggy back systems and additional CAPTOs.

CAPTO components are adequately spaced to prevent ropes from rubbing against each other. The pulley is highly efficient (91% raising efficiency with 11mm rope) and made for long-lasting durability. The becket is integrated directly into the pulley to promote clean rigging and efficient hauling and ascending. As an independent attachment point, the becket is ideal for attaching mechanical advantage components, lanyards, foot loops, and retention systems to prevent dropping the device. CAPTO also has a hollow cam axle (3.9 mm diameter) for installing an accessory loop to support remote resets and device stowage. CMC offers a CAPTO Soft Shackle accessory that is strong, durable, and specifically sized for this purpose (sold separately).

A key feature of the CAPTO is its force-limiting V-groove Cam. The V-Groove Cam is designed to safely dissipate energy in overload situations to protect the rope system. When a load-limiting event occurs, the V-groove Cam will reliably slip to alert the haul team of an issue. Upon inspection and identification of the cause, operations should be able to resume if deemed appropriate. The V-groove Cam is also gentle on rope, making it ideal for hauling heavy loads, taking up slack, or repeatedly ascending and downclimbing. The V-groove Cam can be held open by pushing on the thumb grip, making it easy to collapse haul systems and adjust position. It runs along the rope with minimal friction, allowing CAPTO to travel down towards the load in vertical environments. Watch the Meet the CAPTO video for more information.


  • Combines a rope grab, pulley, and becket in a compact device for hauling & ascending.
  • Incorporates a force-limiting V-groove Cam designed to provide overload protection.
  • Installs quickly on tensioned and un-tensioned lines, no need for knots or hitches.
  • Opens one-handed and gives simultaneous access to components for rapid rigging.
  • Builds efficient M/A systems and smoothly progresses from a 3:1 to a 5:1 M/A.
  • Releases and resets easily, even after high loading, making it ideal for rescues.
  • Travels down rope in vertical systems, resetting and maximizing the haul field.
  • Allows installation of an accessory loop for remote resets and device stowage.
  • Provides an integrated becket for M/A components, lanyards, and foot loops.
  • Works well in combination with piggy back systems and additional CAPTOs.
  • Replaces multiple devices in one, streamlining training and operations.
  • Patented. Made in the USA.


  • Multi-functional rope grab with a force-limiting V-groove Cam
  • High-efficiency, 44.5 mm (1.75 in) diameter sheave pulley
  • Integrated becket independent from rope loading / unloading
  • Moving sideplate with double-action release button
  • Hollow cam axle for accessory loop installation
  • Ridged Cam Grip for one-handed device positioning


  • CAPTO 11 mm Gray:
    • NFPA
      • GENERAL USE (G), ROPE GRAB, Ø 10.5-11 mm
      • GENERAL USE (G), MBS 36 kN (8,093 Ibf) PULLEY*, Ø 13mm MAX
    • CE
      • EN 12841:2006/B; 200 kg, Ø 10.5-11 mm
      • EN 567:2013; Ø 10.5-11 mm
      • EN 12278:2007; 36 kN (18+18)*, Ø 13mm MAX
  • CAPTO 13 mm Red:
    • NFPA
      • GENERAL USE (G), ROPE GRAB, Ø 12.5-13 mm
      • GENERAL USE (G), MBS 36 kN (8,093 Ibf) PULLEY*, Ø 13mm MAX

*Pulley strength testing performed by using CAPTO Becket as Pulley Attachment Point.

CAPTO 11 mm Gray 336011 GRAY 10.5 – 11 MM (7/16 IN) 513 G (1.13 LB) 150 X 70 X 31 MM (5.92 X 2.75 X 1.23 IN) PULLEY: 36 KN (8,093 LBF) NFPA (G) ROPE GRAB & PULLEY; EN 12841, 567, 12278 $359
CAPTO 13 mm Red 336013 RED 12.5 – 13 MM (1/2 IN) 508 G (1.12 LB) 150 X 70 X 31 MM (5.92 X 2.75 X 1.23 IN) PULLEY: 36 KN (8,093 LBF) NFPA (G) ROPE GRAB & PULLEY $359
CAPTO Soft Shackle 293005 BLACK N/A 1 G (.04 OZ) DIAMETER: 3.5 MM (.12 IN); LOOP SIZE: 60 MM (2.36 IN) BREAKING STRENGTH: 451 KG (994 LBS) N/A $6


Mainline Rescue Systems Course

Gain a whole new understanding of mechanical advantage systems in raising and lower modes to supplement and build your rope rescue knowledge.

About the Course

An understanding of mechanical advantage systems — in raising and lower modes — is crucial to all rope rescue technicians. Dealing with Mass and Force is aspects of consequence if not considered during operations. Working with tensioned anchor systems, guying systems, high directionals, load positioning and litter movement all come into play when building mainline systems. If these are areas of concern for you — or simply areas in your rigging and rope rescue knowledge that you’d like to strengthen — this course is for you.

What You’ll Learn

Join us inside Mainline Systems where we’ll dive into must-know material on:

•Understanding the effects of gravity and friction on mainline systems

•Mechanical Advantage Theory

•Terms and definitions of mechanical advantage systems

•Types of pulley systems

•How and when to use Long Line MA Systems

•How and when to use Block and Tackle Systems

•Calculating tension force using the T-Method

•And more!

Course Curriculum

Unit 1: How Forces Are Generated

1.1 How Forces are Generated and How Best to Analyze the System

1.2 Pre-plan the Working Line

1.3 Analyzing a Rope Rescue System

1.4 The T-Method For Calculating Mechanical Advantage

1.5 T-Method Calculation Within a Dynamic System Safety Factor

1.6 Determining Potential Forces in a System

1.7 Shock Loading

1.8 Actual Mechanical Advantage

Unit 2: Mechanical Advantage and Pulley Systems

2.1 Pulley Systems And A Few Differences In Set Ups

2.2 Video Tutorial: Mechanical Advantage, Part 1

2.3 Video Tutorial: Mechanical Advantage, Part 2

2.4 Video Tutorial: Mechanical Advantage, Part 3

2.5 Video Tutorial: Raise Systems During a Two Rope Offset, Part 4

2.6 Video Tutorial: Revealed Concepts of Mechanical Advantage

2.7 Video Tutorial: Theoretical Mechanical Advantage

2.8 Quiz: Pulley Systems

Unit 3: Moving Systems

3.1 Guiding Wisdom of Raising Systems & Mechanical Advantage

3.2 Mechanical Advantage Systems

3.3 Safety Check

3.4 Operating a Haul System from an Operations Perspective

3.5 Very Cool Systems – Floating the Litter Using an A-Frame and Gin Pole Trackline

3.6 Very Cool Systems – Dynamic Directional Offset System Using an A-Frame and Natural High Directional

3.7 Very Cool Systems – Trackline Skate Block Using Gin Pole/Monopod AHD

3.8 Very Cool Systems – Team Scenario – High Angle Two Rope Lower to a Trackline

Unit 4: Lowering Systems Low to Mid Angle

4.1 What is a Lowering System?

4.2 Low Angle Rope Rescue Overview

4.3 The Low Angle Lowering Operations

4.4 Low Angle Rope Rescue Systems

4.5 Low to Steep Angle Litter Trackline Lower Evacuation

Unit 5 Lowering Systems – Mid to Steep Angle

5.1 Mid to High Angle Rope Rescue Overview

5.2 High Angle Rope Rescue System

5.3 The System Broken Down Into Segments

Unit 6: Twin Tension Rope System

6.1 Mirrored or Two Tension Raising Systems

6.2 Twin Tension Rope System Lowering Options Using an Auto Lock System

6.3 Twin Tension Rope System Lowering and Hauling Options Using an Auto-Lock Device

6.4 Video Tutorial: Mirrored Skate Block Overview

6.5 Video Tutorial: Mirrored Skate Block Top Anchor Considerations

6.6 Video Tutorial: Mirrored Skate Block-Configuration of the Bottom Anchor System

6.7 Video Tutorial: V Anchor System for Mirrored & Twin Tension Systems

6.8 Video Tutorial: Twin Tension Mirrored System in Class 4 Litter Movement

6.9 Quiz: Mirrored Raising Systems

Unit 7: Winch & Capstan

7.1 Winch & Capstan

7.2 Video Tutorial: Harken Riggers Winch General Information

7.3 Video Tutorial: Loading the Harken Riggers Winch

7.4 Video Tutorial: Harken Riggers Winch Moving from Descent Mode to Raise Mode

7.5 Video Tutorial: Skyhook Rescue Systems Spec Ops Winch

7.6 Video Tutorial: Industrial Track Line: Bottom Section – Skyhook Winch

7.7 Quiz: Winch & Capstan

Unit 8: Wrap Up

8.1 Wrap Up

Key Terms

Added Perks

Additional features Rigging Lab Academy Members are enjoying

Certificate of Completion

Download your personalized Certificate of Completion after completing the course.

100% Self-Paced

Go through the course material as fast or as slow as you’d like.

Private Discussion Board

Ask questions, meet other students, and even chat with the course instructor.


11mm, 13mm, CAPTO Soft Shackle



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