Review on Prime Line MP5591 50 Corners Aluminum Construction by Kelsey Brown

These corners are MUCH BETTER than the ones stored in plastic boxes. but they have a downside. You need to cut the corners of the pipes on four sides. I used an inexpensive $19 rotary knife kit on the end of my Rotozip. and I did, but it wasn't accurate. Perhaps a band saw with fine teeth would have worked better. but figure out how you're going to cut the pipe before you do it. But they are strong and amazing and they are perfect for the finished screen rim tubes that you can buy at Lowe's.