Size 50 mm Material S2 grade steel construction Transmission system High torque Description: Professional quality screwdriver bits specially designed for use with impact drivers. Forged tip for greater impact resistance and longer life. Impact driver bits. Heat-treated, tough bits for durability and a torsion zone to reduce breakage. Ideal for continuous high-torque use, resistant to load changes due to elasticity. Ultra-strong. Optimal hardness. Optimal torsion zone increases service life. Precision-milled profile for optimal fit. Special bit design for a strong hold. Features: S2 grade steel construction. Ultra-strong. Fits the following models: Any machine that accepts a 6.35 mm hex bit. Impact Bits: Forged for greater impact resistance and longer life. Specially designed for use with impact drivers. Please allow 0.1-0.3 inches size difference due to manual measurement and are within the normal range. Color may vary slightly due to lights, monitors, etc.