PARAMETERS - Applicable tube diameter: 1/4", 5/16", 3/8" (6, 8, 10mm); bending radius: 15/16" (24mm); bending angle: 0 ~ 180. SCOPE OF APPLICATION - suitable for different bending outer diameters of copper and aluminum tubes; only for soft copper and aluminum tubes and other materials, not for iron and stainless steel tubes. MATERIAL - Forged from carbon steel, strong and durable, not easily deformed . By bending from 0 to 180 degrees, you can bend exactly the shape you want. In addition, the tube bender can bend tubes up to 0.4mm without deformation. 3 in 1 - This bender is a 3 in 1 tool for 1/4", 5" tubes /16" and 3/8". It is very convenient for bending tubes of different sizes. FRIENDLY DESIGN - Based on the lever principle, the top handle is longer and the round hole in the top handle allows you to test the size of the copper pipe. The lever allows you to bend the pipe. The non-slip knurled handle prevents the bender from falling when in use and also protects the paint of the bender itself.