Made of steel, this adapter is built to last and withstand even the toughest working conditions. Upgrade your power tools with the Four Square Hammer Adapter. Transform your old drill into a versatile and powerful tool that can handle any job. Whether you're experienced or just starting out, the hammer adapter is a must-have addition to your toolbox. For drilling holes in concrete, brick, and other hard surfaces, as well as chiseling and breaking hard materials.