The DongCheng HD092602 9-Piece Extra Long Hex Key Set is engineered for maximum reach and high turning torque in heavy industrial equipment, automotive engine blocks, and deeply recessed machinery fastenings. Built with extra-long shafts, these wrenches allow technicians to navigate past surrounding obstructions and apply substantial torque to loosen frozen, thread-locked hex fasteners.

Drop-forged from premium Chrome Vanadium (CR-V) alloy steel, the keys undergo specialized induction heat treatment to prevent shaft twisting or edge rounding under maximum torque loads. Finished with a protective mirror chrome plate for corrosion resistance, this 9-piece kit spans 1.5mm to 10.0mm. Held in a size-stamped, quick-access holder and packaged in a slide blister.

Key Features

Maximum Extra-Long Reach: Ultra-extended shaft length bypasses obstacles and reaches deeply recessed fasteners.
Maximum Torque Leverage: Extra length provides high mechanical advantage to crack loose frozen socket screws.
Premium CR-V Steel Construction: High-strength Chrome Vanadium alloy resists permanent twisting and deformation.
Corrosion-Resistant Chrome Plating: Polished protective coating prevents oxidation and shop liquid corrosion.
9 Metric Sizes Included: Full coverage from 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, to 10mm.
Convenient Storage Clip: Heavy-duty indexed bracket keeps keys organized and visible.

Applications

Deeply recessed cylinder head bolts, industrial motor brackets, and pump assemblies
Commercial machinery maintenance, heavy conveyor installations, and toolroom servicing
Truck and heavy vehicle engine compartment maintenance
Factory automation, pneumatic valve manifolds, and robotic equipment servicing

Technical Specifications

Parameter	Specification
Brand	DongCheng
Model Number	HD092602
Tool Type	9-Piece Extra Long Hex Key (Allen Wrench) Set
Arm Style	Extra Long Arm
Material	Chrome Vanadium (CR-V) Steel
Finish / Treatment	Heat Treatment & Chrome Plated
Sizes Included (9 PCS)	1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm
Packaging Type	Packed by slide blister

Size/Model-wise Table

Model	Total Pieces	Arm Length	Metric Sizes Included	Material	Finish	Packaging
HD092602	9 PCS	Extra Long Arm	1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm	Chrome Vanadium (CR-V)	Chrome Plated	Slide Blister

DongCheng 9 PCS Extra Long Hex Key Set (HD092602)

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