Enclosed Dropheads for NPT fit the REED 601PD power drive and are interchangeable with Ridgid 11-R and R200 (through 1 1/4-Inch ), Super Ego 600, Virax 1362, Rothenberger Super Cut hand ratchet threaders and Supertronic portable power threaders. Separate replacement die segments are not available for these disposable, enclosed dropheads. Use R11SC ratchet ring and handle with 1/4-Inch , 1 1/4-Inch dropheads. R20SC ratchet ring and handle works with all R11 dropheads, including 1 1/2-Inch and 2-Inch , provided that the R20 ADAPTER is used with the smaller 1/4-Inch , 1 1/4-Inch enclosed dropheads.2Compact yet high-quality die | Low-cost and disposable | Separate replacement die segments are not available for these enclosed dropheads | Enclosed Dropheads for NPT fit the REED 601PD power drive