The RAMI YOKOTA's Red Rooster impulse wrenches are hand-operated and are made for assembly with threaded fasteners. They offer increase productivity, and are commonly used in agricultural machinery, motors and bike manufacturing, pump making, and similar serial productions. The air motor is wide, and torque is adjustable. They are piston models, lightweight, completely free of reaction forces, operate with minimal noise and vibration levels, deliver speed and power, can operate with high repeatability of the torque level, and have a safety auto shut-off function, offering protection for the user.