Was looking at a used TRD 2way and an initial torque figure is given of 5 not sure of units, kg.m?

I presume this is a measure of how worn the centre is? If so what is a health figure? Was just going to get a centre and get the T3 rebuild kit anyways.

Also if anyone can read japanase, it specifies that its for an ae86 previous term, by this do they mean zenki models?