Essential Replacement: The N078434 spring kit is a crucial component for maintaining the functionality of your impact driver. It ensures that the screw bit remains securely in place within the bit holder system, enhancing the tool's efficiency and reliability. Broad Compatibility: Designed to fit for DeWALT and Porter Cable models, this kit is compatible with for DeWALT DCF885C2, DCF885L2, DCF886B, DCF886D2, DCF886M2, and Porter Cable PCE201 (Type 1) 4.3 Amp 1/4Inch Hex chuck Impact Driver, ensuring a versatile and practical replacement part. Construction: The spring kit includes the N078434 spring paired with the N089668 steel ball, both crafted for durability and resilience. This combination provides good elasticity and long-lasting performance, making it an ideal choice for heavy-duty applications. Complete Kit: Each package contains 2 pieces of the impact driver spring and ball, allowing for a complete replacement and ensuring your tool operates at peak performance. This kit is perfect for professionals and DIY enthusiasts alike. Easy Installation: The spring kit is designed for easy installation, enabling users to quickly replace worn-out parts without the need for professional help. This user-friendly design saves time and enhances the overall user experience. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color:As Shown Material:Metal Package Contents: 2sets * N078434 N089668 Spring Kit