1. IMPACT RESISTANT CONSTRUCTION: Made of high quality impact resistant chrome molybdenum steel construction for high durability and wear . 2. Multiple Sizes Included: Includes 7pcs 3/4 Drive Impact Hex Bits and 2pcs M16-M18 spline bits to cover a wide range of sizes. 3. High Torsion: Solid construction eliminates weak points and provides strength and flexibility to handle high torsional impacts. The size markings are etched for easier reading. 4. Improved practicality: The high-contrast size marking makes it easier to see the correct size even in low light conditions, improving efficiency and accuracy. 5. Wide application: The impact 3/4 drive hex bit set is suitable for impact hex and spline screws with hex bits from 14 to 24 mm and spline bits for sizes M16 and M18. Specification: Item Type: 3/4 Drive Impact Wrench Set Material: Cr-Mo Hex Bits: Approx. 14mm/0.55, 17mm/0.67, 19mm/0.75, 21mm/0.83, 22mm/0.87, 23mm/0.91, 24mm/0.94 Spline Bits: M16, M18 Package list: 7 x Hex Drill Bits 2 x Spline Drill Bits 1 x Storage Box