Precision Straightener with Inverter has upper work rollers that adopt 4 point micro adjusters with reading 0.01 mm advance reference indicators. The Straightener has high precision and durable bearing. The Straightener has touch sensor loop control. The Straightener has air hold down arm and hydraulic mandrel expansion. The Straightener has roll made of bearing steel. The Precision Straightener with Inverter has maximum material width raging from 150 to 600 mm and has motor ranging from 1 to 3 HP.