When buying hand tools price shouldn't be the most important factor although value for money might be.Cheap carbon steel spanners and sockets are adequate for most DIY work but don't last in a commercial...
To an experienced mechanic or engineer the art of using tools properly might seem to be so basic that it doesn't really warrant explanation. It is actually a considerable skill though and one that most people...
Older cars and bikes,made before the 60's often use fixings that need imperial based tools,whitworth,BSF,BA or af spanners,some much later specialised vehicles carried on using whitworth for years after...