Kango Style Fitting Breaker Steels. LOTS OF PEOPLE ARE BUYING THESE THINKING THEY FIT THESE MACHINES, THEY DO NOT, THESE HEREARE ONLY 21MM HEX AND FIT MACHINES LISTED BELOW. THESE DO NOT FIT THE CHEAP CHINESE CONCRETE BREAKERS LIKE YOU BUY FROM SCREWFIX AND B&Q ETC THERE ARE 30MM HEX .