The OSP 4" heavy duty blue rubber caster wheels are high quality and swivel 360 degrees. These are the same casters that are use on the OSP Tour Flight Road Cases. Hardware not included

Mounting Plate:

• 4-1/8" X 3-1/8"
• 12-Gauge Galvanized Steel

Mounting Holes:

• 3-1/16" Center X 2-3/8" Center
• 3/8" Diameter (holes are slightly oval with 3/8" as max opening width)