The Kantor clamp comprised a shield attached to clamping haemostat forceps. Alleged deficiences are that problems with haemostasis were sometimes experienced and also that, as the clamping device was straight, the crushed-skin "dog ears" created by the use of the clamp did not always disappear, leaving a poor cosmetic result. This is more a matter of technique than design - there is no inherent reason why 'dog ears' should be created by this device any more than with any other 'tug and cut' system.
The Kantor clamp in use in Madagascar to circumcise a young boy. Watch the video here.