The 1-1/2 in. x 16-Gauge Straight Finish Electro-Galvanized Nails are ideal for outdoor as well as indoors use. Made of steel for better penetration, these nails are designed with single heads. These nails are designed for use with Hitachi NT65A, NT65A2, NT65A3, NT65M2, NT65M2S, NT65GS nailers. This item measures 1-1/2 in. in length and comes in a 2,500-pack. Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.