The Lucky Double Clamp is light strong & beefy for a reason to save your mug & teeth We dont skimp even on the small components Thats why its made from aircraftgrade 6061 T6 aluminum We designed the clamp for strength & style then slapped the Lucky logo on it to make sure you get that extra Luck while riding in the park or on the street Features Alternating bolts provide an even & extremely tight grip on your bars Two 5mm bolts are included Size 318mm 6061 T6 Aluminium