The DongCheng HD092901 9-Piece Long Ball Point Hex Key Set is designed for deep-reach access and angular fastener engagement in industrial machinery, automotive maintenance, and equipment assembly. Featuring spherical ball ends on the elongated arms, each wrench allows up to a 25-degree entry angle, making it easy to drive socket head cap screws in obstructed or confined locations.

The short arm features a standard flat hexagonal end for applying high seating torque. Manufactured from high-tensile Chrome Vanadium (CR-V) alloy steel, each key undergoes precision heat treatment to resist torsional twisting, rounding, and edge wear. Finished with a corrosion-resistant mirror chrome plating, the set includes 9 metric sizes: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, and 10.0mm. Supplied in an indexed folding caddy and packaged in a protective slide blister.

Key Features

• 25° Angled Ball Point Ends: Spherical profile allows off-axis engagement to turn fasteners in obstructed spaces.
• Extended Long Arm Reach: Elongated shafts provide deep reach into mechanical cavities and increased manual leverage.
• High-Strength CR-V Steel: Heat-treated Chrome Vanadium alloy resists shaft twisting and corner rounding.
• Corrosion-Resistant Chrome Finish: Polished chrome plating protects against rust, moisture, and shop lubricants.
• Full 9-Piece Metric Range: Covers 1.5, 2, 2.5, 3, 4, 5, 6, 8, and 10mm sizes.
• Compact Hinged Holder: Indexed organizer clip keeps keys arranged and securely stored.

Applications

• Servicing recessed hex socket head cap screws in machinery housings and industrial gearboxes
• Automotive engine bay maintenance, manifold fittings, and brake component servicing
• Bicycle suspension setups, disc brake alignments, and handlebar fixtures
• Factory equipment assembly, conveyor maintenance, and precision machinery servicing

Technical Specifications

Size/Model-wise Table