1. Compatible with Multiple Models: This N866410 1/2' impact wrench anvil conversion unit is compatible with a range of tools, including DCF899BType1, DCF899BType3, DCF899HBType1, DCF899HBType3, DCF899HP2Type1, DCF899HP2Type3, DCF899M1Type1, DCF899M1Type3, DCF899P1Type1, DCF899P1Type3, DCF899P2Type1, and DCF899P2Type3, offering versatility and convenience for various applications. 2. Enhanced Performance: The newly improved impact hammer anvil delivers enhanced performance, making it more efficient for challenging tasks. 3. Replacement: This 1/2' (1.27 cm) impact wrench anvil is designed for the 4th generation DCF899 series Type 4 impact wrenches, providing a replacement for your power tool accessory needs. 4. Durable Construction: Made from steel material with a coated surface to ensure durability and longevity even under heavyduty use.