The Hexlox 4mm offers the highest grade of security against bike-part theft - instantly. Hexlox works in magnetic (steel) bolts. Insert your Hexlox into any magnetic (steel) hex bolt you want to protect - this effectively blocks access to your bolt for a potential thief equipped with a hex tool/Allen key.
(Hexlox works with magnetic bolts. If your bolt is non-magnetic, see our Hexlox for Non-Magnetic bolts.)
Together with the Hexlox Key - and your personal and secret Hexlox Key Code - the Hexlox protects your wheels, saddle, seat post, stem, pedals and more, against theft.