The Hexlox 4mm is a small, stainless steel insert that protects virtually any part of your bike - instantly.
Simply Insert your Hexlox into any 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.
Together with the Hexlox Key - and your personal and secret Hexlox Code- the Hexlox protects your wheels, saddle, seat post, stem, pedals and more, against theft.
To determine which size Hexlox you need, insert a hex tool into each bolt you'd like to secure and note the size. Also, use a fridge magnet to determine if your bolts are magnetic - or not.
Hexlox works with steel bolts. If your hex bolts are non-magnetic - Aluminium, Stainless Steel, or Titanium - you need to use a Hexlox for Non-Magnetic Bolts