It is cheap pot metal made in china... torque wrenches sometimes are not the answer to proper tightening. I have been riding and servicing motorcycles for 50+ years and have never used a torque wrench... go figure. And have never had a problem with not tightening whatever properly.
Screw a nut on a bolt that is run thru something to hold it when you use your torque wrench... then test it with another torque wrench. If you only have the one wrench find a friendly full service mechanic who let you compare your wrench with his.
OR... throw away the torque wrench and learn how to gauge tightening without it.
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