Mecmesin 432-614 - 3/8" Lower Chuck Assembly for Use on Helixa Motor Spindle
A standard self-centering 3-jaw chuck with key.
It has a maximum 3/8" (9.5mm) opening and is connected to the Helixa motor-drive spindle via an adaptor with quick-release grub-screw.
Used to secure a variety of test specimens for torque applications.