Features: Boring head can be fine tuned, and durable in use. Can be boring, boring end face, cylindrical, stepped hole, and other processing. Made of high quality 40CR steel, so features high strength and hardness. This lathe boring bar milling holder fit for MT2 MT3 R8 shank. Fine workmanship,and with high accuracy reaching 0.01 mm, applied in milling machine, machining center. Specifications: Material: 40CR steel Color: as shown Large diameter: 50 mm/2.0inch Inner hole: 12 mm/0.47inch Accuracy: 0.01 mm Boring diameter: 10-125mm/0.39 -4.92inch Weight: 709g Package Included: 1 x Boring Head(Not include Boring bar) 3 x Hex wrench Package List 1Boring head can be fine tuned, and durable in use 2Can be boring, boring end face, cylindrical, stepped hole, and other processing 3Made of high quality 40CR steel, so features high strength and hardness. 4This lathe boring bar milling holder fit for MT2 MT3 R8 shank 5Fine workmanship,and with high accuracy reaching 0.01 mm, applied in milling machine, machining center