Multiple piece set: This product includes five different accessories, including an impact drill, chuck head, steel ball, spring, and washer, providing a complete solution for your repair and replacement needs. parts number: Impact Driver Bit Holder Chuck Repair Kit part number are N016823, N019351, N053863, N078434, N089668. Impact Driver Bit Holder Chuck Repair Kit compatible with DeWalt 20V DCF885 DCF886 DCF887 DCF888. Convenient repair: With multiple accessories, this product makes it easy to repair and replace your equipment, eliminating the need to purchase new devices or parts. High-quality materials: The steel balls and springs are made from high-quality materials, ensuring their durability and long lifespan, able to withstand high impacts and pressures., Manufacturer: EMSea