heavy duty caster with rear brake, load capacity 250-350kgs, easy to brake the wheel and the top plate, ... wheel heavy duty caster with rear brake, load capacity 250-350kgs, easy to brake the wheel and the top plate ... a special ON padal, when you unlock the brake, you just step on it instead of kicking ... top of your shoe. The part touch the tyre is made from TPU, it can brake the tpre tightly ...