Ridgid 97075 Model 815A NPT Self Opening Die Head Only Right Hand Thread no Dies 1/8" - 2" is for use With the 300 Power Drive. Self-Opening Trigger foot Automatically retracts dies when Thread length is cut. Individual Machine Die Heads do not include dies. Pipe Capacity 1/4 In. This Die Head is for use With Ridgid's 535-535A-1822 Machines and 300 and 300-A w/carriage.