Fastens papers and documents easily and securely. Complete two-piece fastener includes prong base and compressor. Locking compressors slide over base prongs to keep papers tightly compressed to save valuable filing and storage space. Two-piece prong fasteners made from corrosion resistant steel. 3' capacity. Compressor holes are 8-1/2' center-to-center. 50 sets per box. Made in USA.