Petzl William Ball-Lock Carabiner

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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.


  • 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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