Bostitch P51-10B plier stapler is the newer equivalent to the Bostitch P50-10B model. The P51 stapler also uses the same parts and staples as the P50. This pneumatic plier stapler has a powerful shuttle blade that gives a strong, tight closure without breaking the corrugated surface. Its 6" by 1" throat allows flexibility of staple placement and limits interference from obstacles. Bostitch P51-10B penetrates and fastens up to 2x AB flute or 4x C flute boards.