Sheffield United manager Neil Warnock is concerned over the number of players who wear boots with blades rather than the traditional studs.
"I've not gone into specific details, but I think they are bad - I will ban my players from wearing them if I can," he told the Blades' website.
"They are good at gripping the turf, but there is no give when it comes to turning. I think they are a danger.
"Ankle ligaments will give way before the boots do," Warnock added.