I have been welding for a while now and I decided to make some Chucks of my own!(on my break time) So in this picture, the one on the Left is really heavy hollowed steel and weights a few pounds, the one in the middle is My all time favorite now! and is made of aluminum. Super smooth! and the one on the Right is travel chucks that come apart. Made of steel but actually really hollow and light weight. all made with 550 cord. Feel free to ask any question. or comment!