Brompton front axle hook
Used on L (with mudguard) and R (with mudguard and rack) model Bromptons
When your Brompton bike is folded, this hook hooks the front fork to the rear frame to stop it unfolding when you pick it up. (in combination with the seatpost being in the down position)
One of the "essential" Brompton spare parts - without this your Brompton won't stay folded properly
It works in conjunction with the lower stop disk and seat post (when the seat post is not in the down position the fold is not locked and picking up the bike will cause it to unfold)
Unfortunately over time (being exposed to UV light and the weather) the plastic part can become brittle making it more susceptible to breaking. (Though not that much as we only sold 85 in 2016!)
Tools required: 3mm allen key / hex wrench
Brompton Q part code: QHOOKA
Brompton part number: 9017188