Based on this product's specifications, here are some alternatives and similar models
Diamond Hole Saw GRAPHITE for 58G540 drilling rig, 102×450 mm, 9 teeth
Summary description:
Diamond hole saw by GRAPHITE designed for use with the 58G540 drilling rig. Cutting diameter 102 mm, overall length 450 mm, with 9 diamond-segment teeth for drilling hard materials. Suitable for creating circular holes in concrete, reinforced concrete, masonry and similar substrates. Intended for wet drilling and compatible with rigs that accept this mounting and dimensions.