"Item name: Pressure reducing key buckle Material: Metal Weight: 10 grams Color: black, red, blue, green, yellow The 4 symmetrical bearing structures can be turned over the fingers. It can be said that it has been popular in North America since the beginning of 16 As long as the hand pinch the spindle, a small wave will be able to rotate at high speed, continue to rotate, once you start, Many people believe that this product can help them quit smoking, ADHD, obsessive compulsive disorder, anxiety, post-traumatic stress disorder, meditation and boredom can provide users with sedative effects Packing: 1* pressure relief key buckle Because of the display and shooting light and other reasons, the picture color may have a slight error, please understand Dear friend, welcome to my shop, wish you have a nice shopping, thank you."