Secure chucks systems: Includes double ratcheting metal chucks to ensures firm bit grip and drilling efficiency Sturdy Construction: Made with sturdy alloy and materials for enhanced durability and stability in different working environments Advanced Internal Mechanism: Built with double bearings and alloy gears to minimize friction and extend tool lifespans Double Speed operations: Equipped with a 12 tooth double speed impacts gearboxes for powerful and adaptable speed control Multifunctional Design: Features impacts drilling, standard drilling, and screwdriving functions in 1 tool for versatile applications across various tasks, Manufacturer: ljhnba