Did you order them online or something? Customs only checks so many packages. Worst case they get seized just order another set. Think about all the drugs people just straight up order and have shipped to them and never get caught. The belt buckle/paperweight cover is flimsy and not likely to work should it be brought to court. If you really, really want a pair they're not hard to make. Warning: these things really, really fuck people up. There is a very real chance of permanently injuring if not outright killing someone if they take them to the face. No idea how self-defense laws are in Australia but be ready to ditch and run and hope nobody can identify you.
>>612438
If poorly fitted. The front flats of your fingers should not contact the metal. If they do you'll break them. Problem is on literally every pair of shitty Chinese knuckle dusters I've tried this is what happens. The finger holes need to be oblong not circular to avoid this, and you'll see this on many old ones. The length from front to back is also a factor as it's going to make a big difference on how well the force is transferred to the long bones of the arm. Too long and you can't really close your hand around them, too short and the force is going into your metacarpals. They're really something anyone seriously considering their use should customize to fit.