Made by Hitachi Seiki. This is a 2 OD Boring CNC Lathe Turning Center Turret Boring Bolt-On Block Toolholder. OD Boring Tool Capacity: 2. Locating Keyway Width: 20mm. Bolt Hole Patterns: 80mm x 75mm. Overall Dimensions: 5-3/4″ x 4-1/4″ x 6-1/8 high. Comes exactly as shown in pictures.