Unique Textured Design: The Square Slider features an intricately carved, textured surface that not only adds an artistic touch but also provides a distinct tactile experience. Smooth Sliding Mechanism: Equipped with a well-engineered sliding system, this square slider offers a seamless and satisfying gliding motion, perfect for fidgeting or as a desk toy to relieve stress and keep hands occupied. The black version is common tracks and the white is dense tracks. This one you can also change the plates. Product Square Slider