It's funny how some of you people can get on here and rip mechanicals and you probably haven't even shot a deer w/ them. Here are my results in the past 4 years I have been using the spitfire 3 blade mechanical. 12 deer taken, 2 deer lost (bad shots) all but 1 was a complete pass through. To add to this this was all with only 6 different spitfires. This year I took 5 deer lost none and took 3 w/ the same head. Just clean them sharpen them and put them back in the quiver.