IMO, with the excelent fixed blade broadheads out there today there is little need for any mechanical broadhead to exist any more[]. Too many manufacturers have too many fixed blade heads that fly every bit as good as any mechanical out there and you don't have to worry about any "failures". They leave a big hole going in and a big hole going out the other side.

Some that come to mind are:
Slick trick, Wasp bullet series, Montec, stingers, innerlocks, Rocky Mountain iron heads. I am sure I am leaving out some.