Nomura Tech Wind Lock ZERO Silver 1 piece 【Unused】 Size: 63mm (length) x 37mm (width) x 24mm (height, key detached) x 27mm (height, key attached) Features a double safety mechanism. After installation, removing the black key makes it difficult to unlock, providing peace of mind when you're away. The key needs to be stored securely to avoid losing it. I purchased a set of 3, and I'm selling one as I don't need it. There are no instructions included, so please refer to the internet for usage information. Thank you for looking.