Probably a little small for my application, but has the right amount of power. There were 2 in the order and both had different temple lengths. So I put on the longer one and tried to copy my measurements for the second one, but "NO", it was shorter so I had to redrill the holes awfully close to the holes I had already drilled for the second one. I've already returned a set and I have to do that, so I'm keeping them.