Ridgid 97070 Model 811A BSPT Quick Opening British Universal Die Head no Dies 1/8" - 2". This Right Hand Die Heads Quick-Opening Manually flip throughout lever to retract dies when Thread length is cut. Individual machine die heads do not include dies. Bolt Capacity 1/4 In. This Die Head is for use With Ridgid's 535-535A-1822 Machines and 300 and 300-A w/carriage.