Machinists, this Accusize 8-inch 3-jaw chuck is serious quality for your workshop! With a 2.559-inch center hole and plain back design, it delivers 0.003\ TIR accuracy that's perfect for most turning operations. The semi-steel body provides durability while the two-piece reversible jaws give you both inside and outside gripping options. All jaws are hardened and replaceable, which is awesome for long-term use. This thing can handle up to 250 Nm of input torque and spin at 2500 RPM - plenty of power for demanding jobs. The dimensions are precise with D1 at 6.496\, D2 at 7.087\, and overall height of 4.724\ making it compact yet effective. The z-d mounting with 3-M10 ensures secure attachment, and the construction is built to handle rigorous use and high-speed operations. Whether you're working on production parts or one-off projects, this chuck provides reliable, accurate workholding that makes your job easier. The reversible jaws mean you can switch between internal and external gripping without changing setups. The quality feels substantial - this isn't some cheap import that'll wear out quickly. If you're setting up a new lathe or replacing an old chuck, this Accusize model delivers professional performance without the professional price tag. Seriously, for the money, you're getting chuck performance that rivals much more expensive brands. A solid investment that'll serve you well for years of machining work.