The automatic retractable cardboard cutter features a safety design where the blade retracts automatically after use. It has a magnet, allowing it to be stored on refrigerators, workbenches, etc., preventing loss. It also has a key ring hole for convenient portability. It's useful in various situations, such as opening envelopes, paper, delivery bags, and cardboard boxes. Please refer to the image for the size. Contents: 2 pieces (1 black, 1 ivory)