4″/110mm Horizontal/Vertical Rotary Table ~ Table diameter is 110mm or 4-3/8″. ~ Horizontal overall height is 80mm or 3-1/8″. ~ Vertical overall height is 152mm. ~ Overall length with handle is 280mm. ~ Center height is 86mm. ~ Gear ratio is 90:1. ~ Center hole is 2MT. ~ T-slot width is 11mm or 7/16″. ~ 3 t-slots. ~ 10 second vernier reading. ~ Graduated 360 degrees. ~ One rotation of handle equals 4 degrees on the collar. ~ Worm gear is easily disengaged for free rotation.