Makita Impact Black bits are designed to withstand high torque when used with Impact Drivers. They are constructed from high strength, heat-treated S2 special steel. The black coating is to prevent rust. With precision-made tips to ensure a perfect hold. Up to 20% more durable than a standard bits. Bit Type: Torx. Hex Bit Size: T30. Length: 25mm. Product Range: Makita - Impact Black Screwdriver Bits. Country of Origin: China.