The DONGCHENG HD092902 9 PCS Extra Long Ball Point Hex Key Set is made for mechanics, technicians, machine maintenance teams, cyclists, and DIY users who work on bolts sitting very deep inside housings, frames, and machinery. The extra long arm reaches further than the long ball point set (HD092901), and the ball end turns a hex socket screw at an angle of up to about 25 degrees, so you can work past brackets, panels, and obstructions. The longer arm also gives more leverage on tight bolts. The set covers the most common metric hex (Allen) 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
Extra long arm: the longest reach in the hex key range, for very deep recesses
Ball point ends: turn screws at an angle of up to about 25 degrees
Metric sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm
Extra leverage: the longer arm gives better turning force on tight bolts
Hardened steel: durable keys that resist rounding and wear
Black oxide finish: corrosion resistance and a clean look
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
Very deep-set bolts in housings, frames, and machinery
Bolts behind brackets, under panels, and past obstructions
Bicycle and motorcycle repair
Machinery and equipment maintenance
Automotive and engine bay work
Workshop and industrial maintenance
Technical Specification
Specification
Detail
Brand
DONGCHENG
Model
HD092902
Product Type
Extra Long Ball Point 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, extra long arm, ball point end
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. Use the ball end for fast turning at an angle and the straight end for final tightening, since the ball end carries less torque. Do not extend the key with a pipe, and do not use it as a pry bar or hammer. Replace worn or bent keys.
