And for those who like multiple blade heads, Eclipse makes a four blade model with a replaceable bleeder blade. I shoot heavier bows and prefer four blades with 'smaller' bleeders. Zwickey Deltas served me well for years, but when Blake showed me the prototype Eclipse 4-blade a couple of years ago, I had to have them. The removeable bleeders make them easy to sharpen. The heads are tough, and my average recovery distance on elk and deer this year was less than seventy five yards.