【Package Contents】One SDS Max adapter. Before making a purchase, it is important to check the compatibility of this adapter with the fitting and tool you have. This ensures that the adapter will work properly with your existing equipment.【45 Steel Material】Made of 45 steel, this diamond crown adapter is strong and durable. The choice of this material ensures its strength and ability to withstand forces and harsh conditions.【Transformation Adapter】This core drill is designed to transform a 1 1/4 inch UNC thread to SDS MAX. This is a useful accessory to allow the use of drill bits or accessories with a UNC thread on hammer drills equipped with an SDS MAX attachment. 【Use with core drills】It is specially designed for use with core drills, which often require drill bits with a UNC thread. 【Compatibility with hammer drills】This core drill is compatible with all hammer drills equipped with an SDS MAX attachment. It allows you to adapt accessories or drill bits with a UNC thread to these hammer drills. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store