... head 2.Applying for a patent in USA, Germany,China,Taiwan now. Torque wrench features: 1.with interchangeable head.Quick changing and easy ... .This Innovation Designis Applying for a patent in USA, Germany,China,Taiwan now.Specification: ModelInterchangeableheadTorque rangeLengthNm1b-ft1b-inkg-cmUTW-B100N14*18mm10 ...