In reply to mff513:
The DMM offering has a lethal flaw: the toothed section on the attachment ring. It is quite easy to pull the tape through [ie extend it] in such a way that it lies over the very sharp teeth. I have raised this with DMM but they weren't that interested.
Try it for yourself. Of course you could [should] move the tape off the teeth, but in the fight of a typical winter route you might not, or the tape could move during the run out.
I've filed the teeth off mine. They serve almost no purpose anyway. Another safe ,method would be to never extend the sling by pulling it through: treat it as a fixed loop and extend this with krab and tape.
I use mine quite a bit as a hand placed peg in rock.
Post edited at 09:03