Petzl William Screw-Lock
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.
Where to Buy
Here's what other sites are saying:
The large size of this pear-shaped Petzl(R) William locking carabiner is well-suited for belaying and anchoring needs. Larger size allows easy anchoring of multiple ropes and slings as well as belaying both single or double ropes with a Munter hitch. Unique, patented Keylock gate uses a key-shaped nose on carabiner and slot-shaped gate to create a strong, snag-free closure. 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. Made of high-strength aluminum rod stock for superior strength and durability.
Petzl William Screw-Lock Carabiner DECENT 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 The SPECS 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.
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
Well suited for use in belaying and organization of the work position.