Precise, fast actuating and with diversified functions, this machine is suitable for tightening bo Precise, fast actuating and with diversified functions, this machine is suitable for tightening bolts of various types of threads. It has filled a gap in the domestic intelligent tightening machine field, and reaches the Chinese advanced technical level.We were issued a 'Science & Technology Achievement of Shandong Province' award for this patented product. It has also been featured on national TV as a high-tech tool.Features1) Time for one-run tightening cycle: 15 seconds2) Time for one shifting cycle: 3 minutes3) Torque range: 50 - 200N.m (optional)4) Heads of power output shafts: 1 - 5 heads (off-settable)5) Shifting mechanism suitable for: 2 - 3, 3 - 4, 4 - 5, mutual shifting