Tube Bender, Bend Type Markings Left, Offset, Right, Tubing Outside Diameter 3/16 in, 1/4 in, 5/16 in, 3/8 in, Compatible Tubing Material Aluminum, Copper, Steel, Bend Angle - Minimum 0 Degrees , Bend Angle - Maximum 90 Degrees , Centerline Bend Radius 15/16 in, 5/16 in, Application Tube Bending, Features 90 Degrees Start Requires Less Effort - Making Bending Fast and Easy, Overall Length 8 1/4 in