Feature 1Impact Grade Construction: Manufactured from premium impact grade chrome molybdenum steel construction for high durability and wear resistance. 2Multiple Sizes Included: Includes 7 pieces of 3/4 inch drive impact hex bits and 2 pieces of M16 M18 spline bits to cover a wide range of sizes application. 3High Torsion: Solid construction eliminates weak points, providing strength and flexibility to handle high torsion impact. Size markings are etched for easy reading. 4Enhanced Practicality: High contrast size marking makes it easy to identify the right size even in low light conditions, improving efficiency and accuracy. 5Wide Application: The 3/4 inch drive impact hex bit set is suitable for impact hex and spline screws, with hex bits ranging from 14 to 24mm and spline bits for M16 M18 sizes. Item Type: 3/4 Inch Drive Impact Hex Driver Set Material: Crmo Hex Bits: Approx. 14mm / 0.55in, 17mm / 0.67in, 19mm / 0.75in, 21mm / 0.83in, 22mm / 0.87in, 23mm / 0.91in, 24mm / 0.94in Spline Bits: M16, M18 Package List 7 x Hex Drill Bit 2 x Spline Drill Bit 1 x Storage Box