[What's in box] Contains ST64E concrete t nailer *1 pc, 14 gauge 1-1/4" concrete t nails*1 box and 2-1/2" concrete t nails*1 box (400 pcs/box), allowing you to start working right away. If you need other sizes of concrete t nails, please search asin: B0C331HDL9 to purchase. [Compatible Fastener] Our ST64E Heavy Duty concrete nailer is compatible with 14 gauge 3/4" to 2-1/2" concrete t nails. Suitable for furring strips and concrete applications, delivering durable and reliable fastening solutions. [Wide Applications] Our concrete t nailer providing efficient and reliable fastening solutions for a wide range of construction projects. Including furring strips installation, siding installation, among a wide range of applications. [Heavy Duty Concrete Nailer] Equipped with a safety switch for secure operation, our concrete t nailer features a large magazine capacity, reducing change nails frequency, and is crafted from durable materials for long-term stability in industrial environments. [Upgraded Large Cylinder] This concrete T nailer is equipped with an upgraded large cylinder, suitable for heavy-duty industrial tasks, ensuring consistent high-performance operation. It's capable of handling any challenge with ease. If you have any questions, please feel free to contact us. Hassle-free customer service!