Heavy-duty staples are designed to deliver premium stapling performance. Superior-quality, high carbon steel wire reduces staple buckling and jamming. The finely chiseled points pierce stacks of paper for maximum sheet penetration. Staples are compatible with Bostitch Antimicrobial 215-sheet Extra Heavy-duty Staplers (00540) and Antimicrobial 130-sheet Heavy-duty Staplers (B310HDS). The 13/16" (20mm) leg length staples 130 to 165 sheets.