The 1-1/4 Hilti adapter bit is designed to work with the popular Hilti Model #DD100, DD130, or DD200 core drilling machine. It features a 6-Slot Quick Disconnect on one end and 1-1/4"-7 threads on the other end, making it compatible with various diamond tool products including blades, coring bits, hole saws, and grinding wheels. This adapter is made from durable heat-treated high-speed steel and includes a limited lifetime warranty against warping, cracking, and material defects. It is important to follow the recommended RPM for optimal cutting speed and to avoid exceeding the maximum RPM to prevent damage to the blade or equipment.