Titan Diamond Core Drill 8 Piece Set - Suitable For Wet and Dry Cutting. These are compatible with Erbauer too

One core drill 52mm used once. the rest are unused

also have a 152mm for sale on a other auction.

This diamond core drill from Erbauer is suitable for masonry, bricks and blocks.

Comes with 3x holesaws (38mm, 52mm and 117mm), extension bar, SDS adaptor, 3-jaw adaptor, pilot drill and drift key
Suitable for wet & dry use