HEAVY DUTY CONSTRUCTION: Made of industrial grade heat treated steel for durability and longevity, this SDS Max core drill bit adapter is not easy to break and twist. Giving you convenient to your core drilling GREAT COMPATIBILITY: This 1-1/4"-7 SDS Max shank adapter will help you use your own standard drill machine with diamond core drill bits. Connects to 1-1/4"-7 female thread tool SIMPLIFIED DRILLING: This core bit adapter easily connects the 1-1/4"-7 thread core drill bits to SDS Max shank core drills, ensuring smooth, efficient core drilling WIDE APPLICATION: Our high quality SDS Max core drill adapter with 1-1/4"-7 arbor, which is designed to work in diverse applications: masonry, brick, stone, concrete, block, stucco, etc YOU WILL RECEIVE: 1pc 1 1/4 x 7 thread drill adapter, provides a secure and stable connection between your core drill bit and drill machine Adapts 1-1/4"-7 male thread to SDS Max shank, perfect for connecting diamond core drill bits for efficient drilling.