Method of using a robotic tender for tending a CNC machine, comprising the steps of: providing a part gripping jaw configured to grip a part, said part gripping jaw comprised of at least a left jaw and a right jaw, said part gripping jaw having a first side and a second side, with said part gripping jaw having defined therein a part gripping profile on said first side, configured to grip a part when at least said left and right jaws (22, 24) are activated, wherein said part gripping jaw includes a third side generally perpendicular to said first side; providing a robotic arm with an End of Arm Tool, hereafter named EOAT, configured to engage said part gripping jaw, with said EOAT capable of moving said left and right jaws (22, 24) together or apart, in order to grip a part in said part gripping profile, wherein said EOAT is configured to engage said part gripping jaw at said third side such that said EOAT grips said part gripping jaw at a perpendicular orientation to the surface of said part gripping jaw configured to grip a part; placing a part to be machined in said part gripping jaw in position for pickup by said robotic arm; engaging said part gripping jaw at said third side with said EOAT; moving said left and right jaws (22, 24) into a securing position by action of said EOAT, thereby gripping said part; lifting said part by movement of said robotic arm; moving said part gripping jaw and gripped part to a vise of said CNC machine, and engaging said part gripping jaw with attached part in said vise; disengaging said EOAT from said part gripping jaw and removing said EOAT from said CNC machine; and processing said part in said CNC machine. providing a part gripping jaw configured to grip a part, said part gripping jaw comprised of at least a left jaw and a right jaw, said part gripping jaw having a first side and a second side, with said part gripping jaw having defined therein a part gripping profile on said first side, configured to grip a part when at least said left and right jaws (22, 24) are activated, wherein said part gripping jaw includes a third side generally perpendicular to said first side; providing a robotic arm with an End of Arm Tool, hereafter named EOAT, configured to engage said part gripping jaw, with said EOAT capable of moving said left and right jaws (22, 24) together or apart, in order to grip a part in said part gripping profile, wherein said EOAT is configured to engage said part gripping jaw at said third side such that said EOAT grips said part gripping jaw at a perpendicular orientation to the surface of said part gripping jaw configured to grip a part; placing a part to be machined in said part gripping jaw in position for pickup by said robotic arm; engaging said part gripping jaw at said third side with said EOAT; moving said left and right jaws (22, 24) into a securing position by action of said EOAT, thereby gripping said part; lifting said part by movement of said robotic arm; moving said part gripping jaw and gripped part to a vise of said CNC machine, and engaging said part gripping jaw with attached part in said vise; disengaging said EOAT from said part gripping jaw and removing said EOAT from said CNC machine; and processing said part in said CNC machine.