My intention was to purchase something that would make my friends think I was actually cooler than I am. I don't know what this thing is or does but damn it looks cool in my shop. I show it to my friends and they scratch their heads... \"Gosh Jim... I didn't know you had it in you.\" Well, I don't. But it looks like I do, so yeah... four stars. Next I'm thinking about getting a hammer drill. One of those bigguns. That'll shut Larry up once and for all. Thank you Amazon... thank you for giving me back my manhood!