The VIM ToolsImpact Driver Set, No. IMPACT50, contains 50 pieces and features 3/8” square drive. The included drivers include Torx impact, XZN impact, SAE impact hex, metric impact hex, impact Phillips head and impact flat head. All bits are impact quality and are approved for hand and power tools. A 3/8” to 1/2” square drive adapter is also included. The S2 steel, fully heat-treated tools come in a heavy duty carrying case with a tray for a handheld impact driver, extensions or other accessories.