The Ingco SDBIM21HL133 Impact Screwdriver Bit Set consists of professional-grade power tool accessories engineered to withstand the extreme rotational torque and sudden concussive forces delivered by high-power impact drivers. Measuring 65mm in total length, these bits feature a precise hexagonal drive profile designed to fit securely into matching hex fasteners, ensuring optimal power transfer without slippage.

Each bit is manufactured from high-alloy S2 industrial steel, which undergoes custom induction heat treatment to achieve maximum hardness and high fracture toughness. The extended 65mm length includes a specialized torsion zone that deflects high-torque peaks away from the fastener tip during sudden resistance, preventing tip breakage and screw stripping. Finished with high-strength magnetized tips, these bits hold screws securely during single-handed operation, while the standard 1/4-inch hexagonal shank profile provides non-slip retention inside quick-change chucks.

Technical Specifications

• Brand: INGCO

• Model Number: SDBIM21HL133

• Product Type: Impact Screwdriver Bit Set

• Tip Profile: Hexagonal (Hex Head)

• Bit Length: 65mm

• Shank Diameter: 6.35mm (1/4") Hex Shank

• Material Composition: S2 Industrial Tool Steel

• Treatment Profile: Advanced Induction Hardening with Torsion Zone

• Tip Features: Magnetic Tips for Screw Retention

• Quantity Per Pack: 10 Pieces

• Primary Applications: High-torque impact driving, metal framework assembly, automotive component fastening, machinery maintenance, and structural wood construction

• Packaging Type: Packed by plastic box or hanger label layout