This Marcrist Diamond Professional Core Drill Bit Set is the perfect addition to your drilling tools collection. The set includes three cores with a range of diameters, making it suitable for a variety of drilling projects. The brand Marcrist is known for their high-quality drill bits and this set is no exception. The set is suitable for both corded and cordless drills, and is perfect for professionals or DIY enthusiasts. The drill bits and chucks are made in the United Kingdom and are designed to withstand heavy use. This multi-bit set is a must-have for anyone looking to complete their drilling projects with ease.