HIGHSPEED - Core BitsDesigned for both light and heavy duty drilling, our premium quality laser welded diamond segments provide the best drilling speeds and maximum performance. The Highspeed Core Bits is developed with a softer bond and larger diamonds to make faster cutting easier and is ideal for hand drilling with a shorter drill depth of 350mm. For heavily reinforced high MPa concrete, the core bits is available in a range of diameters from 12mm to 45mm and features