4mm Hex Keys

Find the largest selection of hex keys on Buildiro. Whether you are looking for a cheap 4mm hex key, we’ve got you covered! Explore our amazing database of hex keys today. The same day or next day delivery available from the best UK merchants.
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    • Size: 4mm
    • Hex Key Pack Type: Set
    We found 17 products
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    Expert by Facom 9 Piece Long Hexagon Allen Key Set
    Expert by Facom 9 Piece Long Hexagon Allen Key Set
    from £18.30
    Facom 6 Piece Security Hexagon Allen Key Set Metric
    Facom 6 Piece Security Hexagon Allen Key Set Metric
    £39.95 Tooled-Up
    Magnusson 8 piece Foldable Hex key Set
    Magnusson 8 piece Foldable Hex key Set
    from £7.18
    Magnusson 9 piece Hex key Set
    Magnusson 9 piece Hex key Set
    from £8.76
    Magnusson 6 piece Hex key Set
    Magnusson 6 piece Hex key Set
    from £16.63
    Magnusson 30 piece Hex key Set
    Magnusson 30 piece Hex key Set
    from £16.63
    Magnusson 18 piece Hex key Set
    Magnusson 18 piece Hex key Set
    from £14.95
    Draper Expert 8 Piece T Handle Ball End Hexagon Allen Key Set Metric
    Draper Expert 8 Piece T Handle Ball End Hexagon Allen Key Set Metric
    from £18.07
    Faithfull 9 Piece Long Ball End Hexagon Allen Key Set Imperial
    Faithfull 9 Piece Long Ball End Hexagon Allen Key Set Imperial
    from £19.95
    Faithfull 8 Piece Folding Ball End Hexagon Allen Key Set Metric
    Faithfull 8 Piece Folding Ball End Hexagon Allen Key Set Metric
    from £17.95
    Faithfull 9 Piece Long Ball End Hexagon Allen Key Set Metric
    Faithfull 9 Piece Long Ball End Hexagon Allen Key Set Metric
    from £11.66
    Faithfull 13 Piece Long Hexagon Allen Key Set Metric
    Faithfull 13 Piece Long Hexagon Allen Key Set Metric
    from £16.95
    Sirius 9 Piece Long Ball End Hex Key Set
    Sirius 9 Piece Long Ball End Hex Key Set
    from £8.94
    Faithfull 9 Piece Colour Hexagon Allen Key Set Metric
    Faithfull 9 Piece Colour Hexagon Allen Key Set Metric
    £17.05 ManoMano UK
    Faithful 13 Piece Long Ball End Hexagon Allen Key Set
    Faithful 13 Piece Long Ball End Hexagon Allen Key Set
    from £21.95
    Faithfull 9 Piece Ball End Hexagon Allen Key Set Metric
    Faithfull 9 Piece Ball End Hexagon Allen Key Set Metric
    from £19.95
    Milwaukee Hand Tools 4932478621 Ball End Hex Key Set 9pce
    Milwaukee Hand Tools 4932478621 Ball End Hex Key Set 9pce
    £20.99 UK Tool Centre