1. Loosen Bolts: The impact screwdriver helps you loosen bolts and irregular fasteners easily and quickly. It's a great time-saving tool in your toolbox. 2. 6 Impact Screwdriver Bits: This impact screwdriver bit contains 6 replaceable heads, which is very convenient to replace. 3. Anti-slip thread: This impact screwdriver set adopts fine and regular anti-slip thread. It is comfortable to hold and anti-slip, allowing you to have excellent work efficiency. 4. Chrome Alloy Steel: This impact screwdriver set is forged with chrome alloy steel to withstand large impact loads. 5. Head treatment: The bottom of this impact screwdriver has been specially heat-treated to have anti-knock performance. It is strong, durable and practical. Specification:, Manufacturer: SMTYXS