Another great knife from Kunwu! I have over 100 knives and Kunwu knives are definitely some of the best! Kunwu understands quality control and how to build a premium knife with innovative materials at a fraction of the cost of some other knife companies which will remain nameless? The lock up is Rock solid and there is absolutely no blade play whatsoever. Something that has been a real problem with recent purchases is weak detents causing failed blade deployment. I have fixed thos issue on several recent purchases but this shouldn't be something that needs to be fixed on a premium knife. I have five knives from Kunwu and not one has arrived with a bad detent or any issues that I could find and trust me I am picky when it comes to my knives. Kunwu is leading the way and other companies should probably pay attention and make.the necessary changes to keep up. Side note: WMK is absolutely terrific to order from and there customer service is second to none! You can buy here with confidence!