Semi-Universal Dividing Head Set | Provides High Accuracy With Little Backlash For A Smooth Rotation. | Features Easy Indexing Of Divisions From 2 To 50 And Most Numbers Up To 380. | 3 Dividing Plates Enable You To Use Different Sizes (Included). | Adjustable Tailstock Allows You To Work On Various Size Workpieces (Included). | Ruggedly Constructed Of Hardened And Ground Worm Gear. | Set Also Includes Head, Center And Backplate For Mounting 3-Jaw Chuck.