A: The 3 in. Medium Duty Gray TPR Swivel Plate Caster with Brake 175 lbs. Weight Rating is sold individually.
A: For the 3 in. Medium Duty Gray TPR Swivel Plate Caster with Brake 175 lbs. Weight Rating, the distance between the holes side to side is 42mm (1.65") and front to back is 55mm (2.16").
A: The wheels attach with a fastener of your choice based on the application. These can be used outdoors on solid, flat surfaces only.
A: They attach with 4 lag bolts a piece. If you are talking outdoors like cross country, no. But for use on a patio, should work.
A: This product is manufactured in China.
A: Where else! China!