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The Petzl William Ball-Lock is a large, pear-shaped autolocking carabiner for belay stations and belaying with a Munter hitch.

  • Features

    • Great capacity thanks to its large dimensions; carabiner can hold a very large quantity of equipment and it's the optimal shape for belaying with a Munter hitch
    • Ergonomic shape is designed for gripping with gloves on
    • Asymmetric pear shape facilitates opening and the manipulation of the locking system
    • Keylock system avoids any involuntary snagging of the carabiner
    • Automatic Ball-Lock system features a green ball indicating when sleeve is locked, providing a quick visual safety check
    • Ball-Lock system can be opened and closed easily with one hand and can be operated with gloves on; unlock gate by pressing in ball and twisting sleeve
    • Offers secure use with triple-action opening
    • Large gate opening eases clip-in


    View all Petzl Carabiners
  • Technical Specs

    Best Use


    Carabiner Type


    Gate Type


    Gate Open Clearance

    27 millimeters

    Strength Major Axis Closed

    27 kilonewtons

    Strength Major Axis Open

    8 kilonewtons

    Strength Minor Axis

    8 kilonewtons


    116 x 80 millimeters


    90 grams

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