Black Fidget Slider have many small upwardly raised squares, as well as built-in anti-friction stickers; Black K Card Slider have intricate skull carvings on the front of the metal fidget and a poker-style design on the back, all of which have delicate and smooth surfaces, and are of medium weight and size, making them very comfortable to hold. 【High value Fidget Blocks Set】- There are 2 types of fidget toys, fidget slider/poker push card in 1 set. 【Magnetic Fidget Slider】Magnetic fidget toy can slide very smoothly, they can make an interesting sound which is great fun.