Tube benders *For:1/4",5/16"&3/8" size O.D. tubing ... marking, scraping or flattening of tubing CT-368-90°-A For:1/4",5/16"&3/8" size O.D. ... tubing. CT-368-90°-M For:6mm,8mm&10mm sizen O.D.tubing Note: (1)Aluminum ... 0.4mm thin tube without distortion.(3)Calibrated marking for making accurate left-hand,right-hand,and offset bends ... effort.Make bending fast and easy. Other Items for reference.