Here's what other sites are saying:
The Petzl William Locking Carabiner's large gate opening and huge basket makes it an ideal choice for belaying or use at the power point of your anchor. Petzl makes the William Locking Carabiner with a screw gate, ball lock, or Triact gate to appease the preferences of all climbers. Best of all, this locking carabiner includes a keylock gate for snag-free clipping and unclipping. Whether you go with a quick-and-easy gate or an old-school design, this versatile Petzl carabiner should be with you on every climb.
Description of Petzl William Lock CarabinerA superb Carabiner lock. This Carabiner lock functions great as a additive to the arsinal of a sport rack, or a staple to a trad climbing rack.
- US Outdoor Store
The WILLIAM asymmetrical large capacity aluminum 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.
- Mountain Gear
The Petzl William Screw Locking Carabiner is well suited for organizing at belays and belaying with a Munter hitch.-- Large size to allow anchoring of several ropes and slings-- Large opening-- Keylock System (snag-free body / gate interface)