I don't remember the brand but I purchased these for $15 each at Home Depot about 4-5 years ago to replace the castors on a heavy duty ShopFox planer base. They lock for rolling as well as turning. There was an extra plastic shield which came off & doesn't seem to effect anything. With the Belsaw planer + 5hp motor on the stand I can roll it anywhere with one hand even up over interlocking 1/2" anti-fatigue mats.
"Forget the flat stuff slap something on the spinny thing and lets go, we're burning daylight" Bart Leetch
"If it ain't round you may be a knuckle dragger""Turners drag their nuckles too, they just do it at a higher RPM"Bart