2 1/2 – 4″ / 100mm Receder Head  – To increase the capacity of the Ridgid 300 Threader up to 4″ / 100mm

Accessory for Ridgid 300, 535. 1233, 300 Compact
Capacity – 2 1/2 Inch – 4 Inch

Features:
Jaw clutch prevents jamming.
Simple adjustment for tapered or straight threads.
Cam-type workholder sets instantly.
Fully enclosed gearing.
Right-hand only

https://ukhire.wistia.com/medias/kurba1epog