$18.95 - $20.95

Petzl William Screw-Lock Carabiner

SKU: PTZ-M36SLN//In Stock


William Large Capacity Aluminum Carabiner

This personal protective equipment (PPE) is used for connecting pieces of equipment together. It can be used with personal fall protection systems such as fall arrest systems, work positioning systems, restraint systems, and rescue systems. It is designed for use in mountaineering, climbing and vertical activities using similar techniques. This product must not be loaded beyond its strength rating, nor be used for any purpose other than that for which it is designed.
  • Large size helps with the organization of work area
  • Wide opening for clipping thick bars, several ropes and slings
  • Pear shape allows for belaying with a Munter hitch.
  • Keylock system:
    • snag-free body / gate interface
    • avoids accidental snagging of the carabiner onto the anchor, the rope, the harness
  • Individually tested
  • Red indicator provides a visual warning when the carabiner is unlocked
  • 3 year guarantee



  • 90 g
  • Material: aluminum 7000

Breaking strength:

  • Major axis: 25 kN
  • Open gate: 7 kN
  • Cross-loaded: 7 kN

Gate opening:

  • 24 mm (TL and BL), 25 mm (SL)
  • CE EN 362

Ratings & Reviews

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Very good all around Carabiner.


The petzl william is a really good carabiner. It has a good shape to it for most uses. Large enough to operate a munter hitch with and small and light enough to use as a personal carabiner for your turnouts. I prefer the standard screw lock because with gloved hands it is easier to use with one hand. If you are in a bind you do not have time to fiddle with an auto lock or twist lock biner. In my opinion this is the best general shape carabiner, not too big and not too small. If you solely use 1/2"" rope it will fit snug but this carabiner works really well for 11mm.


"Can this support the average persons weight?"

Sam, the William Screw-Lock has a 25Kn (5,625lbs of force) breaking strength. For point of reference, the human body can sustain about 9Kn force before major internal damage occurs. That said, the William is strong enough to support the average person.