The DongCheng HD092902 9-Piece Extra Long Ball Point Hex Key Set provides maximum reach and high turning torque for deep mechanical cavities, engine compartments, and recessed machinery housings. Featuring extra-long shafts combined with precision spherical ball tips, these wrenches engage socket head fasteners at angles up to 25 degrees off-axis, bypassing obstructions with ease.

The short arm features a flat hex profile that delivers high torque for loosening frozen or thread-locked fasteners. Forged from industrial Chrome Vanadium (CR-V) steel and heat-treated for structural toughness, each key resists twisting, bending, and edge wear. Finished in bright corrosion-resistant chrome plating, this set covers 9 metric sizes: 1.5mm to 10.0mm. Packaged in an indexed storage holder and slide blister.

Key Features

• Maximum Extra-Long Arm Reach: Extra-long shafts reach deeply recessed fasteners and maximize turning leverage.
• Off-Axis Ball Point Profile: Spherical tips permit up to 25° angled entry into socket screws in tight spots.
• Dual-End Fastening Function: Long ball end provides fast spin-in at an angle; short flat end provides maximum final torque.
• Industrial CR-V Steel Construction: Heat-treated alloy steel prevents shaft twisting and edge deformation.
• Mirror Chrome Protective Finish: Resists corrosion, tarnishing, and chemical wear in harsh workshop settings.
• 9 Metric Sizes Included: Complete range from 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, to 10mm.

Applications

• Reaching deeply recessed bolts in machine tools, printing presses, and pump housings
• Heavy automotive mechanical servicing, engine block fittings, and transmission brackets
• Industrial automation, robotic arm fixtures, and pneumatic valve manifolds
• Agricultural machinery, heavy plant servicing, and commercial equipment maintenance

Technical Specifications

Size/Model-wise Table