One-sided key of Ma Yue lock cylinder, OK?

All right. Super Class B lock (Class C): The key shape is single-sided blade internal milling key or external milling key, and the lock core type is side column lock core. Tested by the Ministry of Public Security for 270 minutes, it is technically impossible to open, and the inter-area opening rate is zero (11 in 6 million). Ma Yue lock core has a good one-sided key. Ma Yuesuo is a patented product invented by Li Shande, the chairman of Guangdong Baochen Anti-theft Equipment Co., Ltd., and has won many national invention patents.