Vanquish Products Scale Hardware Tool Tip for 1-64 and M2 scale hardware (VPS01710, VPS01711, VPS01712, VPS05002, VPS05003, VPS05004)
Tool shaft diameter is 4mm
Tool is equivalent to a 2mm nut driver.
Hex shape on tool shaft is made to work in conjunction with standard "cross wrench".
Also compatible with Vanquish Products 1/4" Tool Adapter, VPS08430