Inquiry (采购产品): Swivel and Rigid Casters Kindly inform me if "swivel and rigid" castors would be suitable for my very heavy beds? I am looking for the type that will allow me to move the beds easily and then, with a locking system, lock into a rigid state. I await your advices. Thank you - in advance. Barbara Burnison. **** Hidden Message ***** Barbara Burnison 85730 USA Company: private E-mail: bjburnison@hotmail.com **** Hidden Message ***** bjburnison@hotmail.com