Petzl William Ball-Lock
This carabiner, the Petzl William Ball-lock is the metal sleeve successor to the plastic-sleeved ball-lock. This is my primary locking carabiner, which I use with belay devices, with munters (it is an HMS, designed to take munters readily, even on double ropes), and many other situations. The action is quick and easy with one hand - just push the ball on the sleeve and twist, then release and it locks automatically (do a squeeze check to be sure, of course, as with all lockers).
I did find in Antarctica that in the cold (-30 and below), it was sometimes a bit sluggish. I attribute this to getting condensation into the sleeve and ball while in the tent, which then froze. Working it several times seemed to free it up. I haven't had the problem at temperatures above freezing. And it has worked very well in a couple of hanging changeovers at rappel anchors. The biggest advantage over screwlocks is that the rope can run against the sleeve and not unscrew the sleeve.
I do find the metal-sleeve version a bit more awkward than the older plastic sleeve version with gloves (the black plastic, which is the equivalent). I wish there were an equivalent to the old yellow plastic version which stayed unlocked until twisted shut - this is more convenient when setting up belays or autoblock backups, but of course requires a deliberate action to lock, where both the black plastic and the current metal sleeve versions lock automatically.
Where to Buy
Here's what other sites are saying:
A large carabiner can come in handy in many places. The William Locking Carabiner's shape and size means it's useful for belaying and rappelling with the Munter hitch with single or double ropes, anchoring multiple ropes and slings and keeping the belay station organized.
The pear-shaped Petzl(R) William Ball-Lock carabiner features a handy autolocking gate and 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. Automatic Ball-Lock system features a green ball indicating when sleeve is locked, providing a quick visual safety check. Ball-Lock system can be opened and closed easily with one hand and can be operated with gloves on; unlock gate by pressing in ball and twisting sleeve. Large gate opening eases clip-in. Made of high-strength aluminum rod stock for superior strength and durability.
The William is the latest and largest addition to Petzl Charlets carabiner lineup. It isespecially suited for belaying and optimal use of the Munter hitch, even with double ropes, thanks to its wide size. The William encorporates the Keylock system which eliminates the notch in the carabiner nose, helping to prevent it from snagging on ropes, webbing and anchors. The Ball Lock version is auto locking, making it the most fail safe of the available locking mechanisms. A green ball must be pushed in while the gate is being rotated to unlock the carabiner. Finger grooves in the sleeve make one handed operation possible. Two other locking mechanisms are available Screwlock manual locking and Spinball rapid action manual locking.FeaturesStrengths Open 7kN Closed 25kNWeight 85g
- US Outdoor Store
The William Ball-Lock Carabiner by Petzl is a manual locking pear-shaped carabiner with large opening.