Based on this product's specifications, here are some alternatives and similar models
Diamond Crown RM-TX 1 1/4" 132mm x 300mm dry diamond tool, Flex-compatible
Summary description:
Dry Diamond Crown RM-TX 1 1/4" with dimensions 132 mm x 300 mm, designed for dry cutting and core drilling. Manufactured by Flex under the DISTAR Diamond Crown line, this diamond tool fits 1 1/4" connections and is suitable for drilling into hard materials where dry operation is required. Typical uses include core extraction and hole making in construction, masonry and concrete work.