Based on this product's specifications, here are some alternatives and similar models
GRAPHITE hex adapter for diamond hole saws 57H880
Summary description:
Hex adapter by GRAPHITE (model 57H880) designed to connect diamond hole saws to power drills. The adapter provides a hexagonal shank for secure mounting in drill chucks or quick-change chucks, enabling use of diamond hole saws for drilling in materials like concrete, masonry and stone. Suitable for workshop and construction applications requiring hole cutting with diamond coronas.