John Rumm wrote:

There are prefixes: First letter indicates battery platform. For LiIon
tools that will be:

BÂ*Â*Â* Previous range of LiIon batts
DÂ*Â*Â* Current range

Then the next two letters give a bit of information about the class of
tool. So:

TDÂ*Â*Â* Impact driver
HPÂ*Â*Â* Combi drill
DFÂ*Â*Â* Drill driver
HRÂ*Â*Â* Rotary hammer (typically SDS)
HSÂ*Â*Â*Â* Circular saw
UCÂ*Â*Â* Chainsaw
UHÂ*Â*Â*Â* Hedge trimmer

(and so on - there are loads of them)

but they seem to vary by continent, so be aware if you see a tool on
youtube, then can't find anyone selling it when you search for that model

e.g in the UK impact wrenches are DTWnnn, in the US they're XWTnnn
drill-drivers DDFnnn vs XFDnnn
chainsaws DUCnnn vs XCUnnn

the theme seems to be swap X and D prefix, reverse the next two letters.

Then there is a suffix - that normally just tells you about the way its
supplied, what batteries it comes with etc. The most useful on is
probably "Z" which always means "Body Only" - i.e. bare tool with no
case, batts or charger. (very handy once you have enough batts and
chargers). (although ZJ means the same but with a case)

I've avoided the cult of systainers and shadow foam, but I thought J
suffix was more specifically a makpac case?