The DeWALT DWZSTH999 Quickload Trimmer Head/Spool is a replacement part designed for specific DeWALT trimmer models such as DCTS920, DCST970, and DCST991. It is a black, battery-powered bump feed trimmer head made from durable poly material. The product includes one trimmer head and line, with easy spool features for convenient use. This assembly is suitable for outdoor power equipment tillers and is compatible with string trimmers. The DeWALT brand ensures quality and reliability, making this trimmer head/spool a practical choice for maintaining your yard and garden.