Tool for installation and removal of retention knobs

A tool for installation and removal of computer numerical control (CNC) tool retention knobs, comprising:

• an outer body member having an interior wall, the outer body member having a forward end and a rearward end;
• an inner body member, movably held in the outer body member, the inner body member having a rearward end and a forward end including a top member, the inner body member having:
• an internal bore bounded by an internal inner body member wall surface and a rearward wall,
• an external surface having a first diameter at the rearward end and a second diameter at the top member, the second diameter being larger than the first diameter, and
• at least two locking ball retainer sockets formed in the inner body member at the forward end proximate to the top member, the retainer sockets being located radially around the inner body member,
• a retention knob aperture recessed within the top member and including one or more features configured to engage an irregular wrenching structure of the CNC retention knob for applying rotational torque to the CNC retention knob,
• balls each held in a respective socket of the at least two locking ball retainer sockets and being movable therein, and
• a rotational drive tool cavity, recessed within the inner body member rearward end, the drive tool cavity being sized and configured for receiving a rotational drive tool;
• wherein the outer body member has an interior circumferential portion which is configured to bear against the balls, forcing the balls inwardly when the inner body member is moved into a locked position for the retention knobs within the outer body member, and
• wherein the inward force is removed from the balls when the inner body member is moved into a released position, allowing the retention knob to be removed.