31mm x 1.5p x 10mm bolts

  Set Serrated Reversible Hard Top Jaws. 
 
  Min use and Pristine.
  For 6"  -  7.5"  Kitagawa Style Power Chucks.
  31mm  Wide.
  12mm Groove.
  3 x M10 Bolt Holes on 20mm Centres.
  66mm Long & 37.5mm Deep