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. Beware of scam sites other than Mercari and Yahoo! Auctions. This is for models that can use the key cylinder 08M71-KZL-841 in the second photo. Even if you don't know if the above key cylinder can be used, it can be used if the groove (thinly shaved area) is in the same direction as the key in the third and fourth photos. It's also OK if there's a groove in the middle of the key. The Cross Cub and Super Cub keys are slightly thinner, so there may be some play, and the cylinder may not rotate smoothly. You can solve this with a simple solution, so please comment. The CB200X cannot be used because the key will not fit, but it can be used if you can widen the keyhole with a file. The first photo shows the OBKN58 Monokey and 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 in the fifth photo, you can buy it immediately. (Smart lock keys cannot be used) 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 6) The product is the cylinder set, black sleeve, gold-colored parts, and two screws in the eighth photo. The case and key are not included. The rotating claw is for those who want it for Monolock. As an added feature, you can remove the key even when unlocked. This is very convenient when you remove the case from the bike 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 has been threaded, making it a GIVI one-keying exclusive cylinder. Please ask if you have any questions. No price negotiations. Immediate purchase OK. Thank you.