SPRING &
STEEL
The slipjoint folder is Miguel Hetzel's signature discipline — and one of the most technically demanding forms of knifemaking. There is no locking mechanism. Instead, a precisely ground and heat-treated spring must hold the blade open and closed with exactly the right amount of force and feel.
When a slipjoint is done right, the blade snaps open with a satisfying click and returns with equal authority. Getting there requires precise spring geometry, careful heat treatment, and patient hand-fitting — repeated until the action is exactly right.
Miguel's slipjoints draw on traditional patterns — penknives, whittlers, gentleman's folders — executed with modern materials and an obsessive attention to fit and finish.
WHAT IS A SLIPJOINT?
A slipjoint folder is a traditional non-locking pocket knife where the blade is held open (and closed) by spring tension rather than a mechanical lock. The spring — typically a flat bar of hardened steel running along the spine of the knife — must be calibrated to hold the blade firmly but allow it to be safely folded with deliberate pressure. This is the knife your grandfather carried. Made properly, it's also one of the most satisfying tools you'll ever hold.
CLASSIC FOLDER
Single blade, traditional pattern. Available in a range of handle materials from natural bone and wood to G10 and Micarta.
GENTLEMAN'S FOLDER
Slim, refined and elegant. Designed for the pocket of someone who appreciates craft — a knife that makes a statement without demanding attention.
WHITTLER / TWO-BLADE
Two blades, two springs, one perfectly balanced knife. The most technically demanding slipjoint pattern — and the most rewarding to carry.
THE DETAILS THAT MATTER
WALK & TALK
A well-made slipjoint "walks" smoothly through its travel and "talks" with an audible, satisfying click at full open and half-stop positions. This comes from precise spring geometry and surface finish — not luck.
SPRING TENSION
The spring must be strong enough to hold the blade securely under use, light enough to close safely with one hand, and perfectly consistent across the full range of motion. Ground and set by hand.
HANDLE MATERIALS
Natural bone, stag, various woods, G10 and Micarta are available. Each material demands different fitting techniques and produces a different feel in the hand. Miguel works with you to choose the right one.
READY TO ORDER?
Contact Miguel to discuss your slipjoint commission — pattern, steel, handle material and finish.