Adattatore prolunga 1/4" 3/8" 1/2" barra punta a percussione lungo trapano esagonale gambo
1/4" square head------1/4" hex shank. 3/8" square head------1/4" hex shank. 1/2" square head------1/4" hex shank. There are 3 hex square adapters in different sizes and you can use the proper one for various needs.