Cjell, I got this coaster hub, but i don't know how fix it. 

Step 1…obtain wrenches.

Step 2…Get Busy

These are the three wrenches you'll need to adjust and service your coaster hub. Wheel got a wobble? Grease all gone? Get in there and mix it up with these wrenches. 

Stripped down and weight relieved to take on your next coaster-packing adventure. Gold zinc coating. Proud DIY energy

1 x 15mm cone wrench

1 x 17mm cone wrench

1 x 15mm wrench (axle nuts) 

Sold as a set, set of cones or individually.