Depends on what you're up to. The set you're pointing to will be fine for most everything you'd do with calipers. With micrometers, it's harder to say. You'd b

Depends on what you're up to. The set you're pointing to will be fine for most everything you'd do with calipers. With micrometers, it's harder to say. You'd buy from an established machinery / metrology supply if the work demands it, like Starrett. Or MSC, Enco, etc. if you don't need the best. If you're just screwing around measuring the odd household object and / or using the calipers to get splinters out, Lee Valley will be more than adequate. Also, estate sales are a good place to look for a set of gage blocks. Machinists often die with their stuff, and family has no idea what it is. The machinists would almost universally prefer it remain in use, in the hands of someone who knows how to use it.