Metric 4mm Allen key

  • $5.00

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1 x 4mm Long handle ball end Alen Hex Key

Flow Designs 4mm Allen Hex Key with convenient orange ergonomic grip handle. This means that this tool is quickly accessible and pleasant to handle.

FREE POSTAGE when purchased with any other splitter, diffuser or splitter accessory!

Great for wet or cold weather conditions. The ball end hex key inserts into bolts at an angle up to 25 degrees for reaching into hard-to-reach places.

A must-have tool for the installation for Flow Designs splitters and accessories!


  • Easy to find High visibility orange handle
  • Non-slip grip handle
  • Long handle for further access
  • Ball head for up to 25-degree accessibility