Pro-Drive Fasteners 15.5 GAStaples are excellent for hardwood or maple flooring applications and feature a chisel point angle to reduce splitting during installation. Our 16 GA Staples are great for sub-flooring, gym piling, sheathing and box assembly. They are electro galvanized for rust resistance and feature a unique glue formulae on strips to prevent tool jam. Our 18 GA Staples are made from extra hard wire and are guaranteed not to bend. They are excellent for bamboo and engineered flooring, as well as exotic hardwoods, underlayment, upholstery, soffits, cabinets, interior trim/molding, crafts and more.