IRWIN® Impact Screwdriver Bits TORX TX20 25mm (Pack 20)The Irwin TORX Impact Screwdriving Bits are specifically engineered for use in high torque Impact Drivers. They are manufactured from heavy duty, high grade steel and have a 3 times increased bit life compared to standard screwdriver bits. The screwdriver bits have precision tip geometry that delivers superior fitment, reducing stripping and cam out. They have a Power Groove design for compatibility with the IRWIN Impact Performance Series Magnetic