Product Description These hanger bolts are headless bolts designed to hang materials from wooden structures, walls or overhead One half has a lag thread wood screw with a pointed tip and the other half has standard machine thread with a blunt tip Commonly used to hang wiring and ceiling hooks, the assembly is complete when the lag end is screwed into a pre-drilled hole. From the Manufacturer These hanger bolts are headless bolts designed to hang materials from wooden structures, walls or overhead. One half has a lag thread wood screw with a pointed tip, and the other half has standard machine thread with a blunt tip. Commonly used to hang wiring and ceiling hooks, the assembly is complete when the lag end is screwed into a pre-drilled hole.