Angle & Adjuster Plates

Adjustable Angle Plate and 90 degree Angle Plate.
 
  Adjustable Plate is 8" x 6" with 1/2" Slots and Tee's.
  Really strong locks with brand new nuts.
  No marked Scale.
 
  Angle Plate is 10" x 8" x 6".
  Very Strong 1" Thick Plate.
  3/4" Slots.
 
  Both unknown manufacturer.