You need to know how tube benders work, so you can understand how and when tube bending could be right for you. A tube bender increases the radius of the bend to a safe size so that the tube does not collapse. If you take a thin pipe that you can easily bend by hand (or with both hands over your knee), you will almost certainly end up with a sharp bend and a flat pipe. To know more information about tube bender visit here https://www.samsfabrications.co.uk/folding/