Why the Round Hole?

One of the most common questions we get from people new to Spyderco knives is “Why the Round Hole?” The Round Hole allows the blade of a folding knife to be swiftly and easily opened with only one hand. This revolutionary feature was granted a U.S. utility patent in 1981 and literally helped define the form of the modern folding knife. Unlike thumb studs, disks, and other one-hand-opening attachments, the hole offers a larger surface area for greater reliability and does not interfere with the cutting action of the blade. An iconic symbol of our brand, the Trademark Round Hole™ also serves as a user-friendly alternative to a traditional nail nick in our two-hand-opening folders and a proud expression of our brand identity in our fixed-blade knives.