Abstract: A scissors, preferably for use as one of the elements in a pocket knife such as a jackknife, which is biased to an open position by a concealed spring. The scissors includes two rectilinear blades which are pivotally secured to each other by a pivot at a point intermediate the ends of the blades. The blades are biased to open position in which the blades are at an acute angle to each other by the spring, which is mounted about the pivot. The spring includes a single flat coil which spans an arc of less than 360.degree., typically 270.degree.. One end of the coil has an integral leg perpendicular to the plane of the coil and parallel to and adjacent the pivot. The other end of the coil extends tangentially away from the arc of the spring coil. One of the blades has a pocket, including an extension, adjacent the pivot. The other blade also has a pocket adjacent the pivot, and the leg is located in this pocket. The spring is disposed in the pockets with the coil of the spring extending about the pivot.