The 7mm stroke length is actually pretty aggressive for this tool class—most manual riveters top out at 5mm or so, which means you're pulling the mandrel further in a single squeeze with this BT606.
We've found teh chrome steel mandrels handle repeated cycling without galling better than the 12L14 alloy ones some shops use, and the 300mm arm gives you about a 3:1 mechancial advantage over shorter tools, though it's not gonna replace a pneumatic setup for high-volume work.
40°C sounds low but it's the tempering stage after hardening—what it does is relieve internal stresses in mandrel threads, so you don't get brittle fracture when torquing M8 nuts (and yes, that's a real failure mode we've seen on cheaper kits).
Basically, if you're installing rivet nuts into 1.5mm sheet metal or alumnum extrusions, this tool works fine; it's not suited for hardened steel plates above 3mm thickness, where you'd want a hydraulic unit.
For ordering, MOQ is 50 units (usually 2-4 weeks lead time), and we include 5 mandrels covering M3-M8 plus a wrench—packaged in a carton box that's fine for storage but you'll want a case for field use.