This is a system for one-keying GIVI cases on Honda motorcycles such as the CB400, CL500, CL250, CRF250, Rebel 250/500, Grom, Cross Cub, Super Cub, and Dio110. This system is compatible with models that can use the key cylinder 08M71-KZL-841 (as shown in the second photo). Even if you're unsure if the key cylinder above is compatible, it can be used if your key has a groove (a thinly shaved area) in the same direction as the keys in the third and fourth photos. A groove in the middle of the key is also acceptable. For the Cross Cub and Super Cub, the key thickness is slightly thinner, which may cause some play and make the cylinder rotation less smooth. A simple solution is available, so please comment if you have this issue. The CB200X is not compatible because the key will not fit, but it can be used if you can widen the keyhole with a file. The first photo shows an OBKN58 Monokey and an E43 Monolock, but one-keying is possible with other cases as well. The S250 tool box and GRT720 can also be one-keyed. If you have a Monokey case that uses the security key shown in the fifth photo, you can purchase this immediately. (Smart lock keys are not compatible) For Monolock cases, you will 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 type that matches your case (as shown in the sixth photo). The product includes the cylinder set, black sleeve, gold-colored part, and two screws (as shown in the eighth photo). 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 carrying the case off the bike or when opening and closing it frequently. The material is brass, and it has been black-plated by a plating company. The cylinder has been threaded, making it a GIVI one-keying-specific cylinder. Please ask if you have any questions. Price negotiations are not accepted. Immediate purchase is OK. Thank you.