[Product]  BB-39 Carabiner Grip

what are the advantages and disadvantages of this?
advantages:you can have a grip...
disadvantages:you will really not feel very good when you hold it
ok Tongue_out so it's probably better just to buy a grip.
yes.
Seems pretty useless except as a Beyblade keychain. Buy a launcher grip, unless you want every single beyblade product ever made.

If you are one of those collectors, you're going to need one helluva job!