Transformers Combiner Wars figures.
They combine to form a much larger Transformer.
These figures are the arms and leg guys.
£9 each is cheap compared to buying the whole set (check eBay, they go for £100).
Unfortunately, you're still gonna need the main body section.
Smyths had em for £11 but they're discontinuing the line in their shops so stock will be low.
Those 3 in pic are to Bruticus, to make him, you'll need:
Blast Off - arm.
Vortex - arm.
Swindle - leg.
Brawl - leg.
Onslaught - main body.