Because they are rarely in standard sets, you will often need to purchase them as individual tools or in specialized "automotive" kits.
: Occasionally found in high-end or older RTA (ready-to-assemble) furniture that doesn't follow the more common 4mm/5mm standard. Purchase Options buy 7mm allen key
The 7mm size is most frequently required for specialized automotive and cycling tasks: Because they are rarely in standard sets, you
: Used for some vintage quill stems, seat posts, and specialized handlebar clamps. buy 7mm allen key
: Essential for removing brake caliper guide pins on many European and domestic vehicles (including BMW, Audi, VW, and GM).