BOSTITCH BCS1516-1M 15-1/2 gauge 2" Hardwood Flooring Staples, 1000ct. These Bostitch flooring staples are made of 15.5 gauge High-Tensile galvanized steel. The BCS1516 staples are 1/2" medium crown (width) and 2" length. These staples are primarily used for hardwood flooring applications to concrete or radiant flooring; also engineered for maximum holding power to help prevent floor squeaking. The coated finish eases penetration and increases holding power, and the chisel point preserves the appearance of the work surface in finish applications.