Uniweld RTB118 Crossbow Ratchet Tube Bender Enables the plumber & HVAC/R technician to create precision bends up to 90 Degree of soft copper and aluminum tubing Low friction mandrels and rotating side support blacks provide precision bending in restricted spaces Capable of bending 3/8in, 1/2in, 5/8in, 3/4in, 7/8in, 1 1/8in tubing O.D Provides minimum distortion bends for optimal flow