Spider coupler adapter for use in manually repositioning a CNC milling machine table. This is handy when only the lead screw portion of the spider coupler is attached. The other portion is usually still attached to a stepper motor. You can use one or the other of these adapter heads depending on whether the elastomeric junction (rubbery part in between the two ends) is or is not on the metal coupler connected to the lead screw. When the table is snugged in for alignment and is in the position that you need it to be in then reattach the stepper motor. Useful after a tear-down for maintenance or to check travel of table before reconnecting the stepper. Glue/acetone weld base (screw driver) portion to the adapter head. Used on a Central Machinery Micro mill with a Littlemachineshop.com CNC retrofit that uses Standard Lovejoy spider couplers (L-050 0.250). Change the driver head on the adapter to anything that you would prefer other than a screw driver. Perhaps a hex head of a power screw driver or even a ratchet with an extender. ----- Project notes ----- CAD: Truespace V7.61 Platform: Up!3d using ABS 0.75 filament, fast mode, 200 micron resolution at near 90% fill (for added torsional strength). Art to part time: 45min (including measurement,design and printing). Testing of part: Worked as designed. Groove for blade of screw driver doesn't need to be so deep. used with power screw driver.