The DONGCHENG HD092601 9 PCS Long Arm Hex Key Set is made for mechanics, technicians, machine maintenance teams, cyclists, and DIY users who need more reach and turning force than a standard key gives. The extended long arm reaches bolts sitting deep in housings, frames, and machinery, and the extra length gives better leverage on tight fasteners. The set covers the most common hex (Allen) socket screw sizes and comes in a compact holder for carrying and storage.

Key Features

9-piece set: covers common metric hex screw sizes from 1.5 mm to 10 mm
Long arm design: extra reach into deep recesses and better leverage on tight bolts
Metric sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm
Hardened steel: durable keys that resist rounding and wear
Black oxide finish: corrosion resistance and a clean look
Ball or flat ends: the long arm gives a full-length reach to the screw
Compact holder: keeps the keys organised and easy to carry
Trusted brand: made by DONGCHENG, known for professional-grade tools

What's in the Set

Piece	Size
1	1.5 mm
2	2 mm
3	2.5 mm
4	3 mm
5	4 mm
6	5 mm
7	6 mm
8	8 mm
9	10 mm

Application

Machinery and equipment maintenance
Bicycle and motorcycle repair
Deep-set bolts in housings, frames, and panels
Appliance and electronics servicing
Automotive and workshop use
Home, garage, and DIY tool kits

Technical Specification

Specification	Detail
Brand	DONGCHENG
Model	HD092601
Product Type	Long Arm Hex Key Set (Allen Key Set)
Number of Pieces	9
Size Standard	Metric
Size Range	1.5 mm to 10 mm
Key Style	L-shaped, long arm
Material	Chrome vanadium steel
Finish	Black oxide
Holder	Plastic folding/rack holder
Country of Origin	China
Packaging	Holder in blister/box

Safety Note:

Use the correct size key for the screw to avoid rounding the socket. Do not extend the key with a pipe, and do not use it as a pry bar or hammer. Replace worn or bent keys.

DONGCHENG 9 PCS Long Arm Hex Key Set (HD092601)-A 9-piece long arm hex key set for extra reach and leverage on deep and hard-to-reach bolts.

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