Based on this product's specifications, here are some alternatives and similar models
Drill core holder faster tools 8958415 six-sided for diamond core bits
Summary description:
Six-sided drill core holder Faster Tools 8958415 designed for use with diamond core bits. The accessory provides a secure hexagonal connection between the drill and core bits, enabling stable mounting and torque transfer for coring tasks. Suitable for professional and DIY use where diamond core bits are required for cutting or coring hard materials.