Apparently the company Promax do not know the difference between hydraulic and mechanical disc brakes and also not between set and individually. The brakes were delivered one day after the order, which would be a plus point ever. When I opened the box I saw but it was only one brake. I thought oh well I paid 26's somehow logical that one gets for any two hydraulic disc brakes. When I saw it, however, mechanical disc brakes are I was a little disappointed already. The installation went fairly easily what brought my spirits back up a little. The braking force of the brakes is also quite good, what even a star-making.