Metal Machines are a discount set of cars released in 2018 under the Zuru name. The cars are light, but surprisingly quick. They can still be found at retailers like Wal-Mart and discount stores. They come in 3 packs and single car blisters. It's not clear if they are still planning on producing new cars. I have three of them at the competitive level: Escape (also called Bandit), Signal and Typhoon. Since they're so inexpensive, I've picked up about 50 of these cars to see if there is variation in speed.