KING TONY Flare Nut / Oil Line Wrench, size 14-17 mm, model 19301417, specifically designed for precisely loosening and tightening oil and hydraulic pipe connections without damaging the nuts. It features a precise design that completely surrounds the nut to reduce slippage and increase gripping power, with strong material that withstands high torque and is suitable for automotive work, workshops, and professional maintenance.