Part Number: 878156 Upgrade and maintain your Hitachi coil nailer with the performance 878156 aftermarket piston driver. Designed with precision materials and accurate engineering, this replacement part ensures your tool operates at peak efficiency and reliability. Key Features and Benefits: Exact Fit Compatibility: Specifically engineered for Hitachi NV45AB2 and NV45AB coil nailers, ensuring proper alignment and smooth performance without modification. Durable Construction: Aerospacegrade 2024 aluminum piston provides exceptional strength with lightweight efficiency for fast cycling and consistent driving power. Wear Resistance: Heattreated tool steel 6150 driver blade, Rockwell hardness 5052, delivers outstanding durability under heavy use to reduce downtime and maintenance costs. Reliable Performance: Maintains consistent driving depth and power for professional results across a wide range of applications. Package Includes: 1 piece aftermarket piston driver 878156, as shown in product images. Applications: 1. Roofing installation – drive coil nails quickly and accurately into shingles, ensuring fastpaced productivity for large projects. 2. Siding work – achieve precise nail placement for secure and lasting siding attachment. 3. Deck construction – maintain reliable fastening in repetitive, volume nail driving tasks. This aftermarket piston driver is the ideal solution for professionals and serious DIY users needing a dependable replacement part to restore or maintain performance in Hitachi NV45AB2 and NV45AB coil nailers. Built to withstand tough jobsite conditions, it offers the durability and compatibility you can trust.