For the Enclosed Ratchet Threader Sets, precise dies and dieheads are manufactured on CNC machines. Sets contain dropheads and handle in a compact, reinforced plastic carrying case. Dropheads are available from 1/4” to 2” NPT. Dropheads in these sets fit Reed’s 601PD power drive. Dropheads up through 1 1/4” are interchangeable with Ridgid ® 11-R and R200, Super-Ego® 600, Virax® 1362, Rothenberger™ Super Cut hand ratchet threaders and Supertronic portable power threaders.