The Britool 9-piece metric hex key set has the following features:
Folding, with a retainer clip for easy storage and transport.
Zinc-plated chrome steel wrenches.
Long spherical heads.

The Britool BRIE117816B 9 piece long spherical headed imperial hex key set comprises of the following sizes:-

1/16 - 5/64 - 3/32 - 1/8 - 5/32 - 3/16 - 7/32 - 1/4 and 3/8 inch.