step 1:get some 15mm solid steel tubing at like 5cm long
step 2:drill through one side 4cm deep with an 8mm drill peice
step 3

n the other side drill the rest of the way through with a 5mm
step 4:get two bolts like the double clamps
step 5

ut the bolt through the 8mm side so it comes out the other side then screw it into you axle as usual