Mcusta's first higonokami design friction folder is really a spectacular knife! It features the traditional Japanese one hand opening and closing mechanism. It is not a locking blade, but the pressure of the thumb on the blade back prevents it from closing in use. It also has a firm ball bearing detent, keeping the blade in place whether open or closed - similar to how a linerlock keeps a blade closed. We are a Mcusta Factory Authorized Dealer.