Guardhouse - 2x2 20 Dollar Gold Tetra Snaplock, Coin Holders-10 ea. Fits 20 dollar gold. Guardhouse Tetra coin holders are a great storage solution for your individual coins. Our plastic 2x2 snaplock cases contain a black EVA foam interior to hold your coin in place and provide a great background to let your coin shine against. Guardhouse 2x2 coin holders are made from sturdy acrylic plastic and fit perfectly in Guardhouse Tetra display boxes and white Tetra storage boxes. Guardhouse Tetra 2x2 snaplocks are packed 10 each in an attractive retail display.