Dolly Wheel for Gate

I made this for my gate that was sagging at home. its made to slip on to 40mmx40mm box steel but you could scale to fit almost anything.at its current size you can use the included washers or 2 x 608rs bearingsa 8x70mm bolt with nyloc nut secures the top and a the same will attach the wheel.I've had this in place for nearly 2 years and its going great.Hope it helps someone else out there.