For ergonomic handle shape, multi-functional blade, and of course, the patented SpeedSafe® assisted opening system—don't miss the Whirlwind. It's one of our first SpeedSafe® folders and still one of the best.
Plain Edge, Kershaw Ken Onion Whirlwind Zytel® handle Torsion Assisted Opener. The Polyamide Handle Whirlwind With a 440A stainless steel blade and Featuring the "Speed-Safe" torsion assisted opening system designed by custom knife maker Ken Onion. The blade is 440A stainless steel with a hardness of 55-57. The Polyamide handle (similar to Zytel®) provides a very strong and solid grip and the stainless liners add rugged durability.