The Model PB is similar to the Model B-1 and provides quick attachment to beams and girders and may be used in the general rigging of chain falls and hoists. The clamp hinges in two sections allowing quick installation. This model is furnished with a fluted tool steel locking wedge which holds the clamp in place on a beam. The two eyes allow the clamp to be attached in the vertical or horizontal positions. The clamp is of single unit construction and fits a wide range of flange widths.