We can provide castors with wither wheel lock ( WHL ) or with wheel brake ( WHB ) and / or swivel lock ( SWL ). It is essential that the attachment, if required, is specified at the time of ordering itself. It is difficult to fix these attachments afterwards at the customerís premises. Please note that these attachments are not available for castors of every size of every series. So, before placing your order, please confirm with the company.