The CRKT Ripple Knife is a folding style knife designed by knife designer Ken Onion. The Ripple Knife, from CRKT, 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 K405BX 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. The Ripple K405KXS features a combined Razor-Sharp and Triple-Point serrated cutting edge. The Ripple Knife features a removable stainless steel mirror-polished pocket clip, high-mounted, and also with small CNC-drilled holes. This knife combines brilliant design, custom knife quality, and advanced manufacturing technology in true Ken Onion fashion.
Ken Onion - "Though I have been a devout knife collector since childhood, collecting mostly production knives and anything else I could find, I was unaware of the custom knife industry until 1989 when I saw an issue of Knives Illustrated at a local drug store. From there I found a local knife maker named Stan Fujisaka and begged him to teach me. I made my first knife in November 1991 and have continued the craft since.á While recovering from back surgery in 1996, I decided to try to design a folder that was easier to manipulate than what was available, and not a switchblade. The result was the first assisted opening knife I called "Speed Safe" After finding some information on the whole patent process and consultation from an attorney, I got my first patent, creating a whole new category of knives between manual and auto."