Advances in automotive security systems have given rise to a peculiar problem: Alloy wheels and other car parts rather than entire cars are more often the target of thieves. A solution has been engineered by Ford in the Unique lock nuts, personalized by owners, could prevent alloy wheel thefts. Source: Fordform of anti-theft locking wheel nuts, each individually 3D-printed for the car owner.

The security mechanism is derived from the owner’s voice translated into a biometrically based security key. Software converts a brief voice recording into a printable pattern, which is used to configure the locking nut’s indentation and key. Designed as one piece, the nut and key are 3D-printed using acid and stainless steel, followed by separation and final grinding.

Irregularly spaced ribs inside the nut and indentations that become wider with depth are intended to prevent copies made based on wax imprints. The wax simply pulls apart as it is removed due to the complex architecture of the anti-theft device.

The company said that the security component could also be based on any logo or design of the owner’s choosing.