An electric torque wrench is a planetary torque multiplier or a "gearbox" mated to a brushless electric motor. At the end of the "gearbox" is a reaction device that is used to absorb the torque. This allows the operator of the tool to use the electric torque wrench with very little effort.
2. What is the power tools use for?
Use for ordinary drilling, cutting, polishing etc ;like wall, wood, iron, aluminum etc.
3.What is your lead time?
For samples is 3-7 working days; for mass order , normally is 30 working days.