I was thinking about the first auto lockers(double action) - Wales I think. The twist and push gate versus the new push button, twist, then open gate (triple action). I am not much of a fan for manual lockers now, except possibly accessory uses.

I LIKE the screw _link_s for the new climbers, it is not something they have seen especially the deltas, so they don't mess with them. Most have seen biners and a concept hopw they work CMC rescue LIKES the screw _link_s for the non tri-loading factor. Also the visual look at the _link_s can be spotted like a miss tyed knot. CMC rescue only uses screw gate biners, as safety checks are DRILLED into your whole safety factor. Auto lockers I like and use but gate check-check is a must for any system no matter what you use. I have seen and thrown away both screw gate and auto lockers when they don't work right. I have seen some auto lockers not lock right so check-check is must with the also.

check-check

The ropes course I work on uses screw lockers almost exclusively and I hate it. We also do a very thorough check before the climbers leave the ground, but I've had campers come back down with gates unlocked! The obstacles they face on the ropes course are not much different than the branches we climb. I avoid screw lockers at all costs.

Snaphooks- yes, rec climbers use them. I use them, at least. But again, I am a tree worker/rec climber hybrid, so maybe I don't count. But they should definately be allowed, as they are quite safe.

love
nick

I love language; especially tree climbing language. Can I steal that term? Maybe "climber hybrid" for short?

Those alloy locking snaps feel good in the hands and are safe. I believe the steel version is approved by the American Dental Association (smile when you throw). It is said you can cap one off if you bang your teeth. I have had that experience with a beloved alloy carabiner once.

Tell us more about the visual look of a screw _link_. I personally like the feel of the machine tapered edges but I think you are seeing something I do not see. Please explain.

I am just talking about the delta and oval screw _link_s. During checks the visual of the screw collar being all the way over the threads is just another safety factor as well as the hands on.
We had one screw _link_ get tight but a visual check showed the threads were not covered by the collar. It must have had a piece of TREE in the threads.