Petzl William Locking Biner 4011-033
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Petzl William Locking Biner


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Shop with confidence. If it's not working out like you expected, you can return it.

Really. If it's not up to snuff after you use it (a couple times) you can still bring it back.

It lasts longer than 30 days, but not forever. We'll be fair about it. We're all members here.

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See available Locking carabiners


Show Description

The William’s large internal working area is perfect for use with a Munter hitch, even with thicker double ropes. At an anchor, you won’t be fumbling for space to clip into. The William’s heavy offset design also helps prevent cross-loading when belaying as it shifts into position. Like all Petzl biners, the William boasts the snag-free, strength-enhancing design keylock closure, and red “unlocked” warning indicator.

  • Individually tested.

Tech specs

Show Tech specs
Ideal for
  • Snow and ice climbing
  • Rock climbing
  • Indoor climbing
Gate type Straight
Lock type

Auto-locking biners use a spring mechanism to close. Screwgate have a collar that you screw open or closed.

Material Aluminum alloy
Strength closed 25kN
Strength cross-loaded 7kN
Strength open 7kN
Gate opening 2.5cm
CE certified Yes
Three sigma tested Yes
Made in USA