FEATURES: "TWIN-DEX"™ Combination 5-C COLLET and V-BLOCK in one fixture. Horizontal or Vertical V-Block mounting. 72-position index plate for hard index every five degrees. Two heavy-duty 4" dia. tapered roller bearings in the spindle. Extra large 1-5/8" V-Block capacity. Built-in sine bar for setting angles between hard index locations. Square and parallel within .0002". Spindle runout .00005". Sine Set® is compatible. Fitted wooden case included. Collet Capacity: 5-C. Through Hole: 1-1/4". Height: 6". OAL: 4". Width: 5".