Bicycle fasteners run their own standards, so a general spanner set does not cover them. Pedal threads, headset cups, crank bolts and spoke nipples each take a tool made for that component and nothing else, which is why the job names the tool on this leaf rather than a size doing it.
Chain work needs two tools together rather than one. A chain whip holds the cassette against the direction it wants to turn while the lockring is undone, and a rivet extractor pushes a pin out to break the chain and drives it back afterwards. Neither does the job alone, and the whip here is sized for 8-speed. A chain that is broken and rejoined badly is a failure waiting to happen, which is why the extractor drives the pin back rather than replacing it.
Cranks, pedals and headsets each have their own fitment. A crank puller threads into the crank and pushes it off the axle rather than levering it. The pedal wrench is 15mm because that is the flat on a pedal axle, and the dual-ended headset wrench covers 30, 32, 36 and 40mm across common cup sizes.
Wheel and cable work closes the set out with a universal spoke key for truing and a cable tensioner for setting brakes and gears. A dual connector hand pump fits both valve types, and rechargeable LED front, rear and set lighting sits alongside. Questions go over WhatsApp on 07754288583 with the component. Bicycle lighting is held as a set and as individual front and rear units, all rechargeable rather than taking cells.