Tube Bender Bend Mechanism Style Lever Bend Type Markings Left Offset Right Tubing Outside Diameter 3/16 in 1/4 in 3/8 in 1/2 in Compatible Tubing Material Aluminum Copper Steel Bend Angle - Minimum 90 Degrees Bend Angle - Maximum 180 Degrees Centerline Bend Radius 1 1/2 in 1 1/8 in 11/16 in Application Tube Bending Features Adjustable Hook Cushion Grips - for Extreme Comfort Made of Lightweight Die-Cast Aluminum Optimum Bending Radius - for Each Tubing Size