Came mostly assembled, just had to add the handle bar, rubber foot, and two pieces for the spray holder., You need a torque, and square screw driver plus a wrench to put it together. The wheels are a good size, making the power washer easy to move. The user manual is excellent, shows the breakdown of the power washer, and the power washer comes with a nozzle cleaner, which could be easily misplace if your not being careful.
Took me three minuets to put every thing together, had to look for some tools to put it together.