Irwin 1837407 IRWIN TORX Impact Performance Series Insert Bit, T25, 1-inch, 10/Pk (1837407)

10-Piece Bagged Insert Bit. Built for maximum durability and long life with impact drivers. Forged bit (vs. milled) for superior fitment, which reduces stripping and increases life of bit 3X (Square and Phillips bits only). Manufactured with heavy-duty, cold-forged, high-grade steel to withstand high torque output. Black oxide finish resists corrosion and increases life of bit. Point Size: T25. Shank Diameter: 1/4". Overall Length: 1".