The RIDGID 00-R BSPT-1 (65730) 1 in. Exposed Manual Ratchet Threader Die Head, Alloy RH, BSPT is designed for use with the 00-R (38540) ratchet and handle assembly. It is also suitable for use with the hand-held power drive model 700 (requires adapter, sold separately). The BSPT die head has a nominal pipe size of 1 in.