there are several good folding knives available that can be opened with one hand. These knives are often referred to as "one-handed opening" or "assisted opening" knives. Please note that new knife models may have been released since then, so it's always a good idea to check for the latest options and reviews.
One of the most popular and well-regarded one-handed opening folding knives is the Benchmade Griptilian. It comes in various configurations, including different blade styles and materials. The Griptilian features Benchmade's AXIS locking mechanism, which allows for smooth one-handed opening and closing with ambidextrous access. The build quality and materials of Benchmade knives are generally highly regarded.
Another great option is the Spyderco Paramilitary 2. It's a favorite among knife enthusiasts for its reliable performance and ergonomic design. The Paramilitary 2 uses Spyderco's signature round hole on the blade, known as the "Spydie hole," for easy one-handed opening. The knife has a robust compression lock that provides secure blade lockup during use.
Other notable one-handed opening folding knives include:
Kershaw Leek: A slim and sleek knife with a SpeedSafe assisted opening mechanism.
CRKT M16: Available in various sizes, it features CRKT's Carson Flipper for smooth opening.
Zero Tolerance 0450: A high-end, premium option with a flipper mechanism for easy one-handed opening.
Gerber Paraframe: An affordable option with a simple frame lock design and a thumb stud for one-handed opening.
SOG Twitch II: A compact and lightweight knife with SOG's Assisted Technology for quick and smooth deployment.
When choosing a folding knife, consider factors such as blade material, handle material, locking mechanism, and overall build quality. Additionally, ensure that the knife's features align with your intended use and local laws and regulations regarding knife carry and blade length.