Based on this product's specifications, here are some alternatives and similar models
Brushcutter blade for DeWalt 54V DCMBC723N — replacement knife for brush cutter with handle
Summary description:
Replacement blade designed for the DeWalt 54V DCMBC723N brushcutter. This cutting knife fits the brush cutter with handle configuration and is intended for trimming thick grass, weeds and light brush. The blade provides a solid cutting edge for maintenance work, garden clearing and spot cutting where a blade accessory is required.