Knob for Ortlieb QL1 lower rail hook
Description
By default the hook is secured by an allen key. The new QL2 hooks are secured using a knurled knob. This thing allows you to loosen and tighten the bottom rail hook just with your hands. You will also need a M5x20 (20mm long) bolt. I recommend heating up the bolt, then inserting it into the tightly fitting hexagonal hole. No supports needed, there is a bridge inside the hole, you will need to drill through it using 5mm drill bit. Or a knife and then file the edges.
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