Castor with swivel plate and directional wheel block system 75 mm diameter.
You just have to pull on the pin to indicate one of 4 directions chosen for the castor wheel.
Once the pin is inserted, the castor wheel is locked in a fixed position.
It is a very robust product that serves to move very heavy loads while avoiding the product going off in another direction.
The ball bearings do not need maintenance and the tyre surface is in polyurethane.