small burr-like teeth?

A controversial device, which its inventor claims clamps itself to a rapist's penis forcing him to seek medical treatment and be revealed to the police, will be launched by a South African woman on Wednesday.

The "Rapex" device is inserted into the vagina by a woman who feels she is at risk of rape, and if she is attacked, small burr-like teeth will attach themselves to the tip of the rapist's erect penis, explained inventor Sonette Ehlers.

As he withdraws and becomes flaccid, it is only possible to remove the device by surgery, Ehlers said ahead of a launch and demonstration at Kleinmond near Cape Town.