CDI Torque TLPT4NM 4 Newton Meters Pre Set Torque Limiting T Handle

The description says the torque is preset at 4Nm or 6Nm but some of the reviews say it's adjustable. Which is it?

Is the torque reversible? Can the torque be used for both loosening and tightening?

made in china, taiwan, orUSA? (Amazon would do well to include origin of more products)

Will 5Nm be enough to tighten and hold a collar on a Specialized 55in-lbf (6.2 Nm)? Used on Venge seat collar and round road seat collars...