Armeg Dry Diamond Core Drill Set 11pc (5x Drills + 6x Extras). Introducing the Armeg Diamond Core Drill Kit – providing accurate, smooth and clean breakouts when deep core drilling through brick, concrete, natural stone and other materials! The range of Armeg Dry Diamond Core Drills are designed with a 130mm throat for deep core drilling, allowing the core to drill through a standard brick in one action – with no need to stop and break out the core. 1/2 inch BSP thread system. Ideally suited to lightweight building materials, ordinary facing brickwork, blockwork up to 10n/mm2, general concrete, soft bricks, lightweight blocks, natural stone and limestone. Recommended for use with a 850w drive power tool (minimum). Smooth, accurate cutting – the segments sit in balance with the body and give relief both internally and externally. Made with premium synthetic diamond grit – allows the cores to be used on’rotary only’ for cleaner exit holes, improved performance and product life. Diamond core drills in diameters: 42mm, 52mm, 65mm, 117mm and 127mm. SDS Plus to 1/2 BSP adaptor. Hexagon to 1/2 BSP adaptor. 200mm 1/2 BSP extension. 400mm masonry pilot drill. 225mm A-Taper guide rod. Sturdy carry case.