3 variety different sizesThe 3 sizes for 18 GA norrow crown staples ( 1/4" width:1/2"-400 pcs,3/4"-400 pcs,1"-400 pcs ),total 1200-count.,Fasteners per stick: 100. Rust & Corrosion resistanceGalvanized surface treatment makes the staples keep the strong rust & corrosion resistance. Strong penetrabilityThe T-shaped head and Chisel point design with strong penetrability lets you use staples very easy,and you will have no jams and buckles,and interruptions. Wide applicationsIt is a ideal choice for photo frame assembly,repairing art crafts,cabinet construction and other DIY home improvement projects. Suitable for most brands of 18 GA staplerIt is suitable for most brands of 18 gauge narrow crown stapler very well..