The basic clip enclosed is a one-piece plastic clip formed by an upper and lower jaw element having gripping jaws. The jaw elements are pivoted together by a pedestal-type mount, that interconnects the upper and lower jaw elements together. The pedestal mount has a locking tip which fits into a receptacle formed in the upper jaw element. A U-shaped biasing member biases the jaw elements into their closed, clamping position, which biasing member has a base lying in close proximity to the pedestal mount. A camming finger causes the pedestal mount to bend every time that the rear sections of the jaw elements are squeezed to open the clamping jaws, which bending increases the clamping force of the clip.