815A 1/8" - 2" Self-Open Right-Hand Die HeadThis 815A self opening, right hand die head fits all RIDGID power threading Machines. The quick opening design allows you to quickly change between sizes without the need of tools. Opens automatically after completion of the proper thread length. Self Opening (SO): Automatic release for repeatable number of threads Thread direction: right hand Oil through head: yes Dies used: universal Pipe capacity: 1 8" 2" (3 mm 50 mm) Bolt capacity: 1 4" 2" (6 mm