>What ever happened to the key-lock 'biners that were introduced several
>years ago? If my memory serves me correctly they were mfd by Bonati and
>distributed by 5.10. They were supposed to be an improvement over the
>standard notch and pin. I don't see them offered for sale in stores or
>catalogs anymore. Were they determined to be unsafe...?
You must not have been looking very hard. Most climbing stores, including
REI (I know this is quite far reaching) sell Petzl Spirits, one of the most
popular carabiners on the market.
If you're interested in Kong carabiners try Climb Axe (206) 734-8433 or
your local Sportmart (stretching things even further ;-).