If you possess a bike fitted with the QL2.1 system, except for the ORTLIEB Office-Bag, and you're facing problems like worn-out, damaged, or lost mounting hooks, it's advisable to think about replacing them. You can upgrade with a new set of QL2.1 hooks and a plastic handle. In case the new hooks seem too loose on your bike rack, you have the option to use compatible hook inserts to ensure a snug and secure fit. Features: - 2 QL2.1 hooks (16 mm) with plastic handle - 1 pair each of hook inserts in sizes 8 mm, 10 mm and 12 mm Part number: E212 Barcode: 4013051045537 Product code: ORT AC E212