have bosch stopped making sanding belts for 13 x 457 b&d power file. B&Q have stopped stocking them, all they have is some brand i've never heard of, and nothing for metal...

the bosch ones lasted really well, but some cheap ones i bought off fleabay didn't last 2 secs, literally, before they snapped.

silver line seems to be readily available, are they any good?

The first lot i got were really good, they wore out before they broke.
the second lot not so good, i had a few snapped.

They are cheap, and last a variable amount of time. Some seem to last for ages, some literally a second or two.

I get mine from johnt1102 on ebay and have had no problems with them. Which ones are you using?