Labelmate Quick-Chuck Model Number C-76160 This Labelmate Quick-Chuck (model C-76160) was used for a few months before being replaced with a different chuck style that better suited our needs. It has since been sitting on a shelf out of use and is essentially in new condition. The C-76160 is designed for a 76 mm diameter core and can accept a core up to a maximum width of 170 mm. These chucks come with their original alignment plates, screws, and set screw.