This quick change tool is great! It was a constant pain to change spring loaded bits. The spring has always stretched or broken after little use. Several times I had to unscrew the spring just to install the bit. With a quick release bam-bam and you're done. Right, I had to replace the set screws. The originals were too short, didn't stretch, and rattled. I've used it so many times that the edge of it hits the shaft of the bit and I almost couldn't get it out. It definitely takes a hit. I don't know why I waited so long to get one. Now I won't go without him, and neither should you.