Micro Jig GRR-Ripper T-Bolts
Whilst this is a spare part for the Micro Jig GRR-Ripper, they can also be used with Micro Jig Thumb Knobs (GRH-13-K) to fit into Torquata or Incra T-Track.
Sold as a pack of 10. The bolts are 44.5mm in length and the heads measure 18mm x 12.7mm x 1.8mm. Thread size is 1/4-20 (1/4" 20 TPI).