Gaff Deck Help

@ElSergio02, I recommend the "Bicycle Gaff Index"

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13 double-index cards with red backs (Jacks, Queens, and Kings)

12 double-index cards with blue backs (Jacks, Queens, and Kings)

12 half/half cards (horizontal, vertical, and diagonal splits)

4 double-index cards with red backs (Aces)

4 double-index cards with red backs (Ace/2)

2 double-index cards with blue backs (Ace/2)

3 double-index, double-faced cards (Jacks/Jacks, Queens/Queens, and Kings/Kings)

2 double-index cards with blank backs (Queens)

2 four-index cards (1 with a red back and 1 with a blue back)

1 double-index card with a red back (2 of Hearts/2 of Diamonds)

1 domino card

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(The following product description is presented as-is, a direct copy-paste that has likely been run through a translation tool.)

Here are some of the routines explained in the video tutorial:

The Thought Card: You show a spectator 5 cards and ask them to mentally select and remember one. With a magical gesture, one card vanishes, becoming blank. This blank card is exactly the one the spectator merely thought of.

Oil and Water: You shuffle the deck, then deal out three red cards and three black cards. You then alternate the cards, mixing the red and black cards together. Magically, the red cards and black cards separate. After performing the same experiment a second time, the entire deck visually separates, with all the red cards moving to one side and all the black cards to the other.

Printing: You begin by showing a card that is completely blank (both face and back), then ask a spectator to name any queen. Once the queen is named, you take the blank card and magically cause the face of the spectator's chosen card to appear. Finally, you magically print the back of the card, which you can then hand out for immediate examination.

Merge: You have your audience choose two cards, and with a magical gesture, both cards visibly merge into one. After the audience examines the combined card, you magically separate the two cards, returning them to their original state.

Change: You start by showing a prediction card with a contrasting back. The spectator then chooses a card that doesn't match your prediction. You then take your prediction card and insert it into the deck, leaving it protruding slightly. Suddenly, the card visually transforms into the spectator's chosen card. You can then hand the card out for examination.

4 in 1: You have your audience freely choose four cards, then reveal that they are precisely the four Fours from the deck (Spades, Hearts, Clubs, and Diamonds). Next, you take a special card with a different back and a blank face and place it over the four cards. After a few seconds, the blank card magically prints, revealing the four indices of the Fours.

56 cards (Bicycle Rider back) printed by the US Playing Cards Company

A variety of Index Gaff cards

15 routines explained

Instructional video included (1 hour 40 minutes) in English and French

I've been looking at the Magic and Cardistry one for a while, trying to decide if I should pick it up. It seems like you can do some pretty cool stuff with it. The only downside is that the tutorials are in English, but you can find descriptions of the effects in the product listing.