Columbia River Ken Onion Ripple Series of Folding Knives
Columbia River Ken Onion Ripple Series of Folding Knives
Columbia River Knife and Tool introduces the Ken Onion Ripple series of folding pocketknives.
Columbia River Ripple Series is designed by Ken Onion. This is the first production knife we have seen designed by Ken Onion that is not made by Kershaw. It is also, and more significantly, the first production knife series utilizing the amazing IKBS system of opening – these are not assisted openers. This system utilizes ball bearings in the pivot area and allows for super smooth and fast opening. These knives are AMAZING! You can see them at
This is our favorite series since the Leek from Kershaw– also designed by Ken.
Here is the description from Columbia river Knife and Tool:
He’s back. He’s here. Ken Onion Ripple.

In their first collaboration, Ken Onion and CRKT introduce their Ripple series of folding frame locks with premium stainless steel build and a stiction-free IKBS ball-bearing pivot.

Columbia River Knife & Tool and noted knife designer Ken Onion are proud to introduce their first collaboration together, the Ripple 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, a high satin finish and Razor-Sharp cutting edge. 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.

This Ripple KX405 models are frame lock open build knives 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.