Convert to 1" x 8 TPI with this insert for your ONEWAY Talon Chuck. Designed for smaller lathes, this new chuck from Oneway Manufacturing is loaded with features. Only 3-1/2" in diameter and weighing 3.4 lbs., it features one-handed single key tightening, its self-centering, and its patented profile jaws provide maximum holding power. Both the scroll and base jaws are hardened for long life and smooth operation while the body is nickel plated to resist rust and wear.