the pro's to ours is anyone can install it, don't have to send the ball to anyone person, it's cost less's. no screws to hold it in place, now screw drives to change inserts. there is two phase to this depending on your thumb size, yes you can drop the solid inner insert into place and drill the pitch you want. remember all things aren't for everyone - just take a look at the options it will give you.---thanks

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I know of a interchangeable thumb AND finger product that actually changes the reaction of your bowling ball.  I know this because I use the product.  Now to me, changing the thumb just to get a different size (without using tape) makes very little sense.  Too expensive.  But changing thumbs and/or changing thumb pitch with the simple turn of the thumbhole to completely change ball rotation and reaction...now that makes sense.

Check out the ORIGINAL interchangeable thumb product that all the others have tried to copy...and some have even stolen!

http://www.perfectagrip.com
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Brian
MichiganBowling.com
http://www.MichiganBowling.com

Famous Last Words of a Pot Bowler--"Ok, but this is my last game!"

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