
This adapter converts 1 1/4 inch UNC to SDS plus. Made of 45 steel, strong and durable, not easy to break. Suitable for all hammer drills with SDS PLUS attachment. For use with core drills, UNC thread with SDS PLUS socket. Please check the compatibility of the fitting before purchase. Attention! This one is SDS PLUS, not SDS MAX!!! This adapter cannot be used with hammer mode.