Attached on steel axles to prevent the wheel from moving.

• 1/4" axle diameter x 16.09mm external diameter
• Nickel plated finish
• Supplied in pack of 4 pieces per card

Tips for building your own wheels and axle, fix the axle onto a plywood with wood screws. Put the wheels onto the two ends of axle and then use split pins or axle cap to secure the wheels to the axle.