This 4 piece Upright piano dolly set is equipped with heavy duty 5" double ball bearing, swivel casters.
Raises the piano approximately 2-1/2" off the ground.

The two back pieces have rubber bumpers adding only 7" to the piano's width. This prevents wall damage and reduces the problem of narrow doorways.
300Lbs per piece, max 1200 lbs

Permanently attaches to the piano with wood screws.