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 DeWALT and Porter Cable models, this kit is compatible with DeWALT DCF885C2, DCF885L2, DCF886B, DCF886D2, DCF886M2, and Porter Cable PCE201 (Type 1) 4.3 Amp 1/4-Inch Hex Chuck Impact Driver, ensuring a versatile and practical replacement part. High-Quality Construction: The spring kit includes the N078434 spring paired with the N089668 steel ball, both crafted for durability and resilience. This combination provides reliable elasticity and long-lasting performance, making it suitable for demanding applications. Complete Kit: Each package contains 2 sets of the impact driver spring and ball, allowing for complete replacement and optimal tool performance. This kit is ideal for professionals and DIY enthusiasts. Easy Installation: The spring kit is designed for straightforward installation, enabling users to replace worn-out parts quickly without professional assistance. This user-friendly design saves time and improves usability. Color: As Shown Material: Metal Package Contents: 2 sets × N078434 / N089668 Spring Kit