Rotary grinding fixture with interchangeable spindles. One spindle has a Jacobs 96-f1 collet chuck which takes Jacobs rubber collets. The other spindle appears to take a double angle collet, but not sure which one. Both spindles spin freely and measure 3&1/8” in diameter. Fixture base measures roughly 4&3/4” x 3&3/4” with 1/2” wide keys. Fixture has 60 degrees of graduated increments. There is no branding or makers marks on this fixture other than on the Jacobs chuck. This unit is quite heavy and will be shipped in USPS medium & large flat rate boxes. What you see is what you get. Please feel free to check out my other machinist/tool related items, thank you.