I recently purchased four of these from LSC in Los Angeles and am very happy with both the construction and the price ($14.95 retail.) I am told that Coffey Sound also carries them. Courtney Goodin (aka Goodsound) makes them and says: They are turned from a single piece of 70/75 high-Grade Aircraft aluminum and black hard-Anodized. Thumbscrew is Steel with press-fit Plastic knob. I've been making and using these for about 20 years and never had one fail. They can support more than 100 lbs on the post.