This is a Mori Seiki 1-3/4 I. CNC Lathe Turning Center Turret Boring Bolt-On Block Toolholder. Fits Mori Seiki SL-4 Lathes.
Might fit other models as well, but please check your machine before purchasing. ID Boring Tool Capacity: 1-3/4. Bolt Hole Patterns: 92mm x 85mm. Comes exactly as shown in pictures.