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CRKT 405KXS Ken Onion Ripple, Charcoal Handle, ComboEdge. The Ripple K405KXS has a charcoal titanium nitride coated framelock handle and a 3.125" satin finished blade with a partially serrated cutting edge.
CRKT and knife designer Ken Onion's first collaboration together is the Ripple K405 folding knife series. This knife is noteworthy for its exceptional manufacturing quality, premium stainless steel build, plus an almost unbelievable silky smooth and fast opening action thanks to the use of the IKBS internal knife ball-bearing system.
The modified drop point blade has a high hollow grind, swedged top edge, and a high satin finish. Steel is premium Acuto, stainless, noted for its high chromium and molybdenum content and hardness of 59-60 HRC. It is instantly opened by pressing the blade flipper with either hand. For safety while closed, the blade has a ball detent.
Even the best conventional blade pivot bearings have some degree of friction which resists initial movement, or "stiction." In contrast, the Ripple blade opening action is almost friction-free due to the IKBS ball-bearing system. This innovative and simple design places eight uncaged ball bearings on each side of the blade pivot in races which are machined into the stainless steel handle. It is compact and adjustable at the blade pivot screw if ever needed. Not only is opening and closing exceptionally smooth, the IKBS system is durable and requires little maintenance, and yields a folder with great rigidity and no blade play.
The Ripple K405 model is an open build frame lock knife with stainless steel frames. In typical Ken Onion attention to detail, the frame lock does not create an unsightly gap in the right frame, but its cut is neatly integrated into the grip design of the frame, which is CNC machined with a complex "ripple" textured pattern plus 44 small lightening holes. The Ripple K405BXP receives a blue titanium nitride coating, which is then hand buffed to give a pocket worn look, that is to lightly reveal the underlying stainless steel on the high points. Features a removable stainless steel mirror-polished pocket clip (tip-down), high-mounted, and also with small CNC-drilled holes.