K2 Skates - Alexis axel spacer

My K2 "Alexis" inline skates came with a brake pad bolted on to the shaft of the rear skate on the right foot. After a fall where my ribs were severely bruised by the brake shoved in to my back, I decided I'd be better off without it. So I unbolted the rear wheel and took it off, but the axel shaft is too long and was left loose without the brake attached. These spacers help make sure the skate frame grips the bearings properly and their taper helps keep the bolt heads from catching on anything.