Either defective or fake. i'm willing to bet The thing is cheap. Poor build quality. The cap wobbles terribly when you try to tighten it. You can't even put a full clip on the biggest bat. I pulled a real one out of my tool box and stuck a bit in but couldn't even get it out to drill through the brass. I thought I just got a bad one so I ordered a replacement, this one is the same terrible quality. This seller should be permanently banned for trying to pass this on to buyers.