Ortlieb says about the QL2.1 Hooks With Handle
For Office-Bag, Commuter-Bag, Commuter-Bag Two. Worn, broken or lost QL2.1 mounting hooks? No problem! Simply replace the hooks with a new set of QL2.1 hooks and adjustable handle. If the new hooks are too loose on your bike rack, use the appropriate hook inserts for a snug fit.
+ 2x QL2.1 hooks (16 mm) with adjustable handle + 1 pair each of hook inserts in sizes 8 mm, 10 mm and 12 mm