I use the 3 blade- Pro Series Spitfire....It's the only mechanical I have ever used. I have great success with complete pass thru's and lethal cutting damage. I'am sure there are other mechanical's on the market that will work just as well. If you want one that will hit exactly were you field point does this mechanical will do that. "Caution" : when you take a mechanical out of your quiver make sure all blades are in a locked close position before you hunt with them!!!!!!!!!!!!!!