Just curious- At $17.99- they look pretty impressive and are less than half of the spitfires. I'm very pleased with my muzzy 3 blade 100's, but want tofire a few mechanicals before Oct. Thanks for the help

They are basically a Rocket Hammerhead. Should be good heads, IMO.

Mobowhuntr, you are close. They are actually the same head as a Rocket sidewinder. If you have a bow pushing at least 60 ft/lbs of Ke I think they would make a good choice for deer size game. I do have a full review of them on my website.

Ah man......if I can't do better n that......I just as well hang it up.... [&:]

I knew they were a Rocket SOMETHING........thanks 5 shot.

i remeber someone having a like to a KE converter does nayone remeber where that was

If you are looking for the formula, it's speed x speed x weight / 450,240.

oh okay

You can also go to www.bowjackson.com and use that calculator to figure your KE. All you need is your arrow speed andweight.