Petzl William Screw-Lock

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Large, pear-shaped locking carabiner for belay stations and belaying with a Munter hitch

The WILLIAM asymmetrical large capacity aluminium carabiner has a pear shape that is practical for easily connecting multiple items. Its ergonomics and Keylock system facilitate manipulations, even when wearing gloves. The WILLIAM carabiner is available in two locking systems: manual SCREW-LOCK or automatic BALL-LOCK.


  • Great capacity thanks to its large dimensions:
  • - carabiner can hold a very large quantity of equipment
  • - optimal shape for belaying with a Munter hitch
  • Ergonomics:
  • - shape designed for gripping with gloves on
  • - asymmetrical pear shape facilitates opening and the manipulation of the locking system
  • - Keylock system to avoid any involuntary snagging of the carabiner
  • Available in three locking systems, each for different situations:
  • - SCREW-LOCK: occasional use, dirty environments
  • - BALL-LOCK: frequent use with practical automatic locking; secure use with triple-action opening


  • Material: aluminium
  • Major Axis Strength: 27kN
  • Minor Axis Strength: 8kN
  • Open Gate Strength: 8kN
  • Weight: 85g
  • Gate Opening: 28 mm
  • Certification: CE EN 12275


SKU 4171
Brand Petzl
Shipping weight 0.1000kg

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