... Full range of sizes Diamond core drill bits for concrete,wall,floor,masonry, dry use 1, Suitable in Asia, ... 450mm, 500mm, extra long up to 1500mm.6, Available wall thickness: 1.5mm, 2mm, 2.5mm, 3mm.7, All ... CRI28 or PIXIE, etc.8, Full inspection of the adaptor size and concentricity by the most advanced inspection equipment ... request. Diamond core drill bits for concrete,wall,floor,masonry, dry use