These do the trick, no fumbling with buckles or clasps, to get in and out of the leash. Simple one handed operation.
If you have big hands (as I do), you might be wishing for a bit more coverage on the padding around the wrist loop, but not a huge deal, thats what gloves are for.
Well lets put it this way, the design remains unchanged after fifty years. Does that mean it is outdated? No! It meanns that there is nothing to improve.
For the competent mountaineers to the Big Wall Pirate, these are tools of the trade.
NOTE: This is not the gear to buy if you are just starting out rockclimbing.
Black Diamond screws are the best hands down.
Petzl's may have all sorts of gimicks, Grivels feel a bit sharper when new, and OP screws might be a bit easier on the wallet, but for long term use, and a screw that keeps its bite year after year, these are the goods.