4 X 5″ Swivel Tilting Table ~ Heavy and sturdy machined construction. ~ Range is 45 degrees each way from the vertical position. ~ Keyway slot at bottom of swivel base is 0.485″. ~ Swivel base graduation is 360 degrees. ~ Can be locked into position with 2 clamping screws on each end. ~ Two machined “T” slots that are 0.31″ width. ~ Precise ground table surface.