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The Extra Long Allen Key Set for the Bolts Other Keys Cannot Reach
Thirteen extra long metric hex keys, 1.27mm to 10mm, with extended arms from 80mm up to 222mm. Includes the 3.5mm, 4.5mm and 5.5mm half sizes most sets leave out, in one friction clip holder with clear size markings.
Deep reach and leverage
Some bolts sit at the bottom of a housing, deep in machinery or behind an assembly no standard key can cross. Extended arms up to 222mm reach the fastener and still leave hand room to turn it - and the longer the arm, the more leverage on a seized or stubborn bolt.
Reach with the ball, tighten with the short arm
The 25 degree ball end turns a screw at an angle deep inside a housing when you cannot get in straight. Once the screw is seated, switch to the short arm for final tightening. It grips the full hex and takes the torque the ball end is not shaped for.
Chamfered tips, satin CR-V steel
Precision chamfered tips locate the socket and guide the key smoothly in, even at the bottom of a deep recess where you are working by feel. Each key is forged from chrome vanadium steel and heat treated to resist bending and rounding under torque, even at full arm length, with a bright satin finish that resists corrosion and wipes clean.
Allen key sizes (short arm x long arm)
| 1.27mm | 12 x 80mm | 4.0mm | 24 x 140mm |
| 1.5mm | 14 x 90mm | 4.5mm | 26 x 148mm |
| 2.0mm | 16 x 100mm | 5.0mm | 28 x 158mm |
| 2.5mm | 18 x 112mm | 5.5mm | 30 x 168mm |
| 3.0mm | 20 x 126mm | 6.0mm | 32 x 178mm |
| 3.5mm | 22 x 132mm | 8.0mm | 36 x 198mm |
| 10mm | 40 x 222mm |
Sizes subject to manufacturing tolerances, approximately +/- 2mm.
Why choose this set
- Extended arms up to 222mm reach bolts standard and long keys cannot
- Covers the 3.5mm, 4.5mm and 5.5mm half sizes most sets miss
- CR-V steel and heat treatment for strength and durability at full length
- Ball ends and chamfered tips for angled access and clean engagement
- Ideal for workshop, machinery and deep recessed fixings
Care and use
Keep the keys clean and dry, and 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.










