Monsoon Hardline Mandrel Kit for 3/8" ID, 1/2" OD Tubing Includes mandrels in 45, 90, 180, and 360 Extended support arms that hold tubes in position while bending and set the precise angle Polished center line channels to help maintain tube round shape while bending Machined from solid aluminum and anodized for maximum durability and long service life Tube channels are polished to prevent tubes from marring while bending