Ergonomic utility knife

摘要

A utility knife having a handle with a shaft portion and a lower protrusion for improved ergonomics is disclosed. The shaft portion has a bore for receiving a collet and the knife includes a central knob for cooperating with the collet to clamp a blade into the collet when the knob is rotated in a first direction and to move the collet axially out from the handle, thereby freeing the blade, when the knob is rotated in the other direction.