The Candy Crush Saga free switch Hand Booster can be bought and used at any time during the game.
You buy them with gold bars which in turn have to be bought with real money, either paypal, credit card or prepay cards, or you may win one on the daily booster wheel.
It allows you to switch 2 candies that don't match.
It is very useful for getting 2 special candies together to make a powerful combo!
Also very useful on ingredients levels where you may need to move an ingredient accross to get it down the exit column.
Also very useful on ingredients levels where you may need to move an ingredient accross to get it down the exit column.
Here is a demo video which shows how it works.
I used it in the last 2 moves in this video to complete the level..
The video was made on level 28.