A Tata Hitachi 110 side cutter is a high-quality, hardened, and corrosion-resistant steel component that bolts to the side of an excavator bucket to provide a cutting edge for material removal and clearing. It's a heavy-duty accessory designed for the EX110 excavator model, used in construction and mining to enhance the bucket's performance and longevity by improving its ability to cut through tough materials and resist wear.