The musespani 4-Pack Wet Diamond Core Drill Bit Set is designed for drilling into concrete and brick with bit sizes ranging from 1.73" to 4.4". These high-quality drill bits feature great durability and a long service life, making them ideal for various applications. The green-colored bits have a segment height of 10mm and come with a USA thread size, ensuring compatibility without the need for adapters. With exquisite appearance and novel design, this set is perfect for professional and DIY projects alike.