200mm 1-1/4 Dry Diamond Core Drill Bit. The Vari-Drill D20 series are laser-welded, high performance tools, which provides durability and a free cutting performance. This drill bit has been designed for heavy-duty applications when working with medium to hard concrete for 1.5 – 4kW motors. It offers high cutting speed and wear resistance in all drilling operations even in difficult conditions. For use in a wide range of materials, including hard, medium, soft and abrasive concrete, asphalt, brick and concrete blocks. Ideal for general contractors and is developed for professional use in all-round applications. Optimal performance on hard concrete and natural stone. Good performance on medium concrete and brick. Occasional use on soft concrete. Segment Dimensions (L × W × H): 24.0mm × 4.0mm × 9.0mm + 2mm. Number of Segments: 14. Suitability: DM406H, DM650, DMS240.