These 6 in 1 mandrel or forming pliers are my preferred tool for creating loops and bails in wire to create jewellery. You can see how I use these tools in my jewellery make tutorials. These are also excellent for making earring hooks too.
They are made from carbon steel with black handles.
These pliers will create 3mm, 4mm, 6mm, 8mm, 9mm and 10mm loops. 
145x79x12mm