Choose options
The 13 Piece Metric Allen Key Set With the Sizes Others Leave Out
Most Allen key sets jump from 3mm to 4mm to 5mm. HemBorta includes the 3.5mm, 4.5mm and 5.5mm half sizes in between - the sizes that stop a job dead when the screw does not match the set. Thirteen long ball end hex keys from 1.27mm to 10mm, in one friction lock holder with clear size markings.
Reach with the ball, tighten with the short arm
The 25 degree ball end is for access - it turns a screw at an angle when you cannot get in straight. Once the screw is seated, switch to the chamfered short arm for final tightening. It grips the full hex and takes the torque the ball end is not shaped for. Two ends, two jobs, no rounded screws.
Industrial CR-V steel, twin-layer finish
Each Allen key is forged from chrome vanadium steel and heat treated to resist bending and rounding under torque. The black oxide finish is sealed under a clear high-gloss enamel, giving lasting corrosion resistance with a deep black look. Keys arrive under a light protective oil film - wipe it off before first use and store the set dry.
Allen key sizes (short arm x long arm)
| 1.27mm | 12 x 73mm | 4.0mm | 23 x 106mm |
| 1.5mm | 13 x 78mm | 4.5mm | 25 x 110mm |
| 2.0mm | 15 x 82mm | 5.0mm | 27 x 116mm |
| 2.5mm | 17 x 89mm | 5.5mm | 29 x 126mm |
| 3.0mm | 18 x 93mm | 6.0mm | 31 x 136mm |
| 3.5mm | 20 x 96mm | 8.0mm | 33 x 150mm |
| 10mm | 38 x 165mm |
Sizes subject to manufacturing tolerances, approximately +/- 2mm.
Why choose this set
- Covers the 3.5mm, 4.5mm and 5.5mm half sizes most hex key sets miss - no job stopped by a missing key
- CR-V steel, heat treated, black oxide sealed under clear gloss enamel
- Chamfered anti strip tips help prevent stripped screws and speed up assembly
- Ball ends and long arms reach awkward angles and recessed bolts
- Ideal for flat pack furniture, bike maintenance, 3D printers and everyday DIY
Care and use
Wipe the protective oil film off before first use and keep the keys clean and dry. Apply light oil before long-term storage. Always use the correct size key for the screw, and tighten with the short arm rather than the ball end.








