This is a system to make GIVI cases one-key compatible using the internal groove key of Kawasaki motorcycles, such as Ninja, Ninja 1100 SX SE, H2SX, Versys 1100, 650, Ninja 400, and Eliminator. If your motorcycle key has the same shape (internal groove key) as the one in photo 4, then it's compatible. Please be aware that sites other than Mercari and Yahoo! Auctions are likely scams. Photo 1 shows the Monokey OBKN58 and Monolock E43, but you can make other cases one-key compatible as well. S250 toolboxes and GRT720 can also be made one-key compatible. If you are using the security key shown in photo 2 for your Monokey case, you can purchase immediately. (Smart lock keys are not compatible.) For Monolock cases, you need to replace the rotating claw with one for Monokey. If you want a rotating claw, it will be an additional 700 yen. There are two types of rotating claws: round and square, so please specify the same type as your case (photo 3). The product includes the cylinder set, black sleeve, gold-colored parts, and two screws, as shown in photo 5. The case and key are not included. The rotating claw is for those who want to use it with Monolock cases. As an added feature, you can remove the key even when the case is unlocked. This is very convenient when you remove the case from the motorcycle and carry it, or when you open and close it frequently. The material is brass, and it has been black plated by a plating company. The cylinder is a genuine Kawasaki product, but it has been modified with screw threads, making it a GIVI one-key compatible cylinder. There is an installation video. Although the motorcycle is a Suzuki, the cylinder shape is almost the same, so it should be helpful. https://youtu.be/-DbeqXFpMo4 Please ask if you have any questions. Price negotiation: Not accepted Immediate purchase: OK Thank you.