Open end and box wrenches (spanners) are not sized specifically for bikes.

There are no fasteners on a bike which are not also on automobiles and other machinery.

Any decent set of wrenches which works on bikes will also work for cars and other machines.

Park Tools is overpriced for what they are.

Craftsman is decent quality. Snapon tools are extremely well made but also very expensive. I don't know what is available in Singapore.