The world’s smartest and best looking anti-theft system for bike parts. Insert Hexlox into any hex head bolt you want to protect (key sold separately). A high strength magnet in base of Hexlox activates at the turn of the key. Prevents thieves from using a hex wrench to steal your wheels, saddle, seatpost, stem, pedals and more. Black color features durable diamond-like carbon coating. Also available: Hexlox non-magnetic kit for aluminum, stainless steel, or titanium bolts. Kit features a thin magnet that attaches to the bottom of your hex bolt broach. Precision engineered and manufactured in Germany. Stock one key code to minimize SKU count or carry different key codes to maximize security for each customer. 3rd party web sales (eBay, Amazon, etc.) are strictly prohibited by the manufacturer