Petzl William Screw Lock Carabiner

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The Petzl William Screw Lock is a large, pear-shaped locking 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
  • Manual screwgate system features red band indicator to show carabiner is unlocked, providing a quick visual safety check
  • Large gate opening eases clip-in
  • Recommended for dirty and dusty environments that can cause autolocking carabiner mechanisms to malfunction


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


85 grams

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