From their website:
Rebel Minis is proud to present our 15mm Biker Gang(on Motorcycles). Perfect for any urban adventure or for a little Hell On the Highway. Each pack contains 5 Models and are perfect for modern or near future gaming. The Bikers come with Pistols, shotguns, Chains and also the deadly Chainsaw. The Bikers are sculpted in amazing detail by Martin Baker and the motorcycles were created by the Obi Wan of 3D digital sculpting, John Bear Ross.