I've had this kit since they came on the market. It's been subjected to untold abuse repairing rusty brake lines and still cleans up to make custom lines for a street rod. The verity of lines is great, I have the master kit which is great to make carry out lines and adapters plus GM trans line and the 37* AN adapters. Now if they'd just hurry up and get the 1/2" push to connect adapters done so we can make Duramax lines.