Petzl Croll

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A Petzl Croll with the gate closed, open and with a rope locked in place. Petzl croll.JPG
A Petzl Croll with the gate closed, open and with a rope locked in place.

A Petzl Croll is an ascending device [1] used in caving and industrial rope access made by the French company Petzl. Its name comes from the town Crolles where Petzl's company headquarters are located but might also be a reference to the nearby cave system of the Dent de Crolles, the exploration of which triggered a lot of technical effort leading to innovation in caving equipment.

Ascender (climbing) jumar

An ascender is a device used for directly ascending a rope, or for facilitating protection with a fixed rope when climbing on very steep mountain terrain.


Petzl is a manufacturer of climbing gear, caving gear, work-at-height equipment, and headlamps based in Crolles, France. The company was created by the cave explorer Fernand Petzl in the mid-1970s. Their three specialties are:

Crolles Commune in Auvergne-Rhône-Alpes, France

Crolles is a commune in the Isère department in southeastern France. It is located in the Isère valley, 20 km northeast of Grenoble, upstream on the river Isère. It has given its name to the Dent de Crolles mountain, which stands just above the city.



The Croll is normally used in the chest position and in conjunction with an upper ascender or Jumar. This configuration allows a climber, caver or rope access worker to rapidly ascend a rope.


In 1968 Bruno Dressler asked Fernand Petzl, who worked as a metals machinist, to build a rope-ascending tool, today known as the Petzl Croll, that he had developed by adapting the Jumar to the specificity of pit caving. Following these developments, Fernand Petzl started in the 1970s a small caving equipment manufacturing company Petzl.

Fernand Petzl world-renowned caver and manufacturer of outdoor equipment under the brand name Petzl

Fernand Petzl was a caver and manufacturer of outdoor equipment under the brand name Petzl.


Related Research Articles

Caving Recreational pastime of exploring cave systems

Caving – also known as spelunking in the United States and Canada and potholing in the United Kingdom and Ireland – is the recreational pastime of exploring wild cave systems. In contrast, speleology is the scientific study of caves and the cave environment.

Tree climbing

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Rock-climbing equipment type of tool for climbing

A wide range of equipment is used during rock or any other type of climbing that includes equipment commonly used to protect a climber against the consequences of a fall.

Bolt (climbing)

In rock climbing, a bolt is a permanent anchor fixed into a hole drilled in the rock as a form of protection. Most bolts are either self-anchoring expansion bolts or fixed in place with liquid resin.

In rock climbing and ice climbing, a pitch is a steep section of a route that requires a rope between two belays, as part of a climbing system. Standard climbing ropes are between 50 and 80 metres long, so a pitch is always shorter, between two convenient ledges if possible; longer routes are multi-pitch, requiring the re-use of the rope each time. In free climbing, pitch refers to classification by climbers of the difficulty of ascent on certain climbing routes.


A Prusik is a friction hitch or knot used to attach a loop of cord around a rope, applied in climbing, canyoneering, mountaineering, caving, rope rescue, ziplining, and by arborists. The term Prusik is a name for both the loops of cord and the hitch, and the verb is "to prusik". More casually, the term is used for any friction hitch or device that can grab a rope. The word is often misspelled as Prussik, Prussick or Prussic, as it is a homophone with the term prussic acid.

Single-rope technique single rope technique

Single-rope technique (SRT) is a set of methods used to descend and ascend on the same single rope. Single-rope technique is used in caving, potholing, rock climbing, canyoning, roped access for building maintenance and by arborists for tree climbing, although to avoid confusion in the tree climbing community, many have taken to calling it "stationary" rope technique.

Pierre Chevalier was a well-known caver and mountaineer from France, with many alpine ascents and cave explorations to his credit. Chevalier is principally known for the exploration of the Dent de Crolles cave system over a twelve-year period, which became the deepest cave in the world. Chevalier recorded this exploration in his book Escalades souterraines.

Pit cave

A pit cave, shaft cave or vertical cave—or often simply called a pit or pot ; jama in South Slavic languages scientific and colloquial vocabulary —is a type of cave which contains one or more significant vertical shafts rather than being predominantly a conventional horizontal cave passage. Pit caves typically form in limestone as a result of long-term erosion by water. They can be open to the surface or found deep within horizontal caves. Among cavers, a pit is a vertical drop of any depth that cannot be negotiated safely without the use of ropes or ladders.

Rope access form of work positioning, initially developed from techniques used in climbing and caving

Rope access is a form of work positioning, initially developed from techniques used in climbing and caving, which applies practical ropework to allow workers to access difficult-to-reach locations without the use of scaffolding, cradles or an aerial work platform. Rope access technicians descend, ascend, and traverse ropes for access and work while suspended by their harness. Sometimes a work seat may be used. The support of the rope is intended to eliminate the likelihood of a fall altogether, but a back-up fall arrest system is used in case of the unlikely failure of the primary means of support. This redundancy system is usually achieved by using two ropes - a working line and a safety line.

Grigri (climbing) assisted braking belay device

A Grigri is an assisted braking belay device manufactured by Petzl designed to help secure rock-climbing, rappelling, and rope-acrobatic activities. Its main characteristic is a clutch that assists in braking under a shock load. The success of this device has led to grigri becoming a common name for devices of this type. In 2011 a new version, the GriGri 2 was released to replace the original which has been in production since 1991. Competitors include the Faders Sum, Trango Cinch and Edelrid Eddy.

Dent de Crolles mountain

The Dent de Crolles is a karstic mountain of the Chartreuse Mountains range, 17 kilometres north east of Grenoble, Isère, France. It has a characteristic "tooth-like" profile and is easily recognizable in the Isère Valley (Grésivaudan) in the Grenoble area. Its name is derived from the town of Crolles, located next to the mountain.

Big wall climbing

Big wall climbing is a type of rock climbing where a climber ascends a long multi-pitch route, normally requiring more than a single day to complete the climb. Big wall routes require the climbing team to live on the route often using portaledges and hauling equipment. It is practiced on tall or more vertical faces with few ledges and small cracks.

Petzl Stop

A Petzl Stop is a descender used primarily in caving and industrial rope access made by the French company Petzl.

Caving equipment is equipment used by cavers and speleologists to aid and protect them while exploring caves. The term may also be used to refer to equipment used to document caves, such as photographic and surveying equipment.


  1. Petzl Sport - Croll Chest Ascender
  2. 1 2 3 "Archived copy" (PDF). Archived from the original (PDF) on 2010-07-04. Retrieved 2011-01-14.