206-179 AKA 206179, 3563801 is a Widia /Manchester  RH 1-5/8  bar capacity, 1/2″ Ledge Style, 1″ wide x 4.5″oal Separator Toolholder,  uses the Seperator 3/32 or 1/8″ inserts. Has replaceable components for the 1/8 or 3/32.

1/8 is 435-155 and 333-102

3/32″is 435-154 and 333-101