In celebration of Slipknot's fourth studio CD, All Hope Is Gone, the multi-platinum nine-piece metal band have revealed a new set of masks.

The Slipknot masks have become an integral part of the band over the years and the new set are more intricate and disturbing than ever.

Check out photos of the new masks and a take a retrospective look at some of the older headgear here.

All Hope Is Gone is released in the UK on 25th August.