Tube benders *For:1/4",5/16"&3/8"size O.D. tubing. *Material: Al alloy body *Can bend ... CT-368-180°-AFor:1/4",5/16"&3/8" size O.D. tubing. CT-368-180°-M For:6mm,8mm&10mm size ... bend 0.4mm thin tube without distortion.(3)Calibrated marking for making accurate left-hand,right-hand,and offset bends 180 ... requires less effort.Make bending fast and easy. Other Items for reference.