The Blue zirconium discs from ebay are as good as any I have tried from my local welding supplier, but you normally need to buy a hundred to get them for anywhere close to a pound each.

There are plenty sold at car boot sales and probably ebay that last about a minute each, you can see by looking at them that the quality is poor.

A pack of 10 Kingspoor or similar from my local welding supplier worked out around £2.20 each last time I enquired

£11 each is outrageous.

if you email me your address I'll send you a couple of the blue ebay ones to try, me and a pal buy them by the hundred and have 50 each.

Alan.

Machine Mart do a fair selection

Neil

Smith and Arrow flap discs on ebay, in 5" flavour , are good, as are their 5" x 1mm cutting discs . and when worn down a bit , fit a 4" grinder.. I buy 100 at a time so they work out cheap as chips…

Silverline ones disappear into dust rapidly…but they're really cheap..ok for a one off diy job