Grip Rite 18 Gauge Narrow Crown Staples (5000 ct) are for use with most 18 Gauge Narrow Crown "SX"-style Collated Staplers, including the Grip Rite 18 Gauge Narrow Crown Stapler, which is sold separately. Grip-Rite stainless steel fasteners are recommended for all exterior applications. These are specifically useful with James Hardie Trimproducts.