The Die Collars is a special external fishing tool which is engaged on the outside wall  of tubular  objects  such  as  tubing  and  drill  pipe  etc.It  is  also  used  to  catch  the  cylinder  junks  which  have  no  inner  bore  or  the  inner  bore  is  blank  off.It  can work with right or left hand drill pipe and other tools to achieveall kinds of fishing  job.