Petzl William Screw-Lock

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The William carabiners are HMS carabiners (meaning…

Rating: rated 5 of 5 stars

The William carabiners are HMS carabiners (meaning they are designed with using them with a Munter hitch in mind). For a screw-lock, this one is excellent (but then, with a name like "William", how could someone like me, named William, consider it to be anything less than excellent?). In situations where a screw-lock is appropriate, this has been my standard for several years, along with the smaller Attache. In setting up anchors, where several ropes might be attached, the William gives plenty of room.

The disadvantages of screw-locks in general are well-known - you need to watch the direction the rope is running, since the rope can rub on the sleeve and undo the lock, and you need to remember to not overtighten the sleeve, especially after the inevitable dirt gets in the threads. Overtightening can make screwlocks very difficult to open.

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Manufacturer's Description

Visit Petzl's William Screw-Lock page.

Retailers' Descriptions

Here's what other sites are saying:

The large size of this pear-shaped Petzl William locking carabiner is well-suited for belaying and anchoring needs.


On Sale. Petzl William Screw-Lock Carabiner FEATURES of the Petzl William Screw-Lock Carabiner Large size and opening to allow easy anchoring of several ropes and slings Wide pear shape facilitates belaying with a Munter hitch Keylock system helps prevent snagging of the carabiner during maneuvers Red indicator provides a visual warning when the carabiner is unlocked (on Screw-Lock version) Tearing energy absorber is protected from abrasion with a zippered pouch. Also allows quick and easy inspection of the condition of the webbing Short, third arm attached to energy absorber, convenient for Tyrolean traverses, for climbing while close to the cable or attaching to rungs (while resting) Harness connection loop is twisted to facilitate connecting to the harness with a girth hitch SPECIFICATIONS of the Petzl William Screw-Lock Carabiner Major Axis Strength: 25 kN Minor Axis Strength: 7 kN Open Gate Strength: 7 kN Case Quantity: 30 Aluminum Certification(s): CE EN 362, CE EN 12275, types B, H (SL), types K, B, H (BL and TL) UIAA 121 (SL, BL only) The SPECS for Screw-Lock Weight: 88 g Gate Opening: 25 mm The SPECS for Ball-Lock Weight: 92 g Gate Opening: 24 mm The SPECS for Triact-Lock Weight: 92 g Gate Opening: 24 mm ALL CLIMBING SALES ARE FINAL.

- Moosejaw

A locking, pear-shaped carabiner with an extra-wide 2 in. clearance for belaying and rappelling.


Elegant European styling and a quarter century of experience differentiate Petzl's carabiners from the pack. The large pear-shaped William Screw Gate carabiner is engineered for belaying and hauling applications.

- Mountain Gear