We apologise that due to the wearing out of our Piranha disc destroyers we cannot offer this service.
All we can suggest is that you run the discs through a shredder, which is very messy, or cut them which makes them very, very difficult to restore.
Alternatively send them for recycling, but this is not secure destruction. Should you find an alternative technology, please let us know.
It is possible that some of the document destruction services may offer this service.
Piranha Dimpling system made the disc unreadable, but they seem to have gone out of business in the USA.