Based on this product's specifications, here are some alternatives and similar models
Brushcutter / Hedge Trimmer Blade Attachment for STANLEY 54V (model DCMBC823N) — Knife for Clearing Thick Brush
Summary description:
Attachment blade designed for use with a 54V STANLEY brushcutter/hedge trimmer (model DCMBC823N). Intended for cutting and clearing thick brush and dense vegetation, this knife accessory fits the compatible handle/shaft configuration and provides a durable cutting edge for land maintenance, overgrowth removal and pruning tasks around gardens, plots and smallholdings.