Type Quick Change Tools Kit Tool Post Tool Holder For Lathe Tools Change Tools. Accuracy: designed to ensure repetitive accuracy. Quickly and easily installed on a lathe engine, bench or tower for a wide range of operations. Size stud M-10 and perfect for most mini machines, although modifications may be necessary for some machines (sleeve or a new center rod for a smaller hole may be necessary). Reduce installation time: instant change from one operation to another. All working parts are accurate and hardened. Completely sealed for maintenance-free work. Rotate: the unequaled rigidity of this pillar of tools and holders ensures smoother turning without chatter or vibration. Drilling: allows you to drill with the power of your carriage, instead of manual work or tailstock. Hard cuniform tool post design, easily centered. Usage: CNC machine tool accessories. Type: 250-000, 250-001, 250-002, 250-004, 250-007, 250-010 (optional). Capacity of the tool. 250-000: 1/2 cuniform type tool post. 250-001: 1/2 turning tool holder. 250-002: 1/2 boring, turning tool holder. 250-004: 3/8″ and 1/2″ heavy duty boring bar holder. 250-007: 1/2 parting blade tool holder. 250-010: 1/2 knurling and turning tool holder. Package size: 145 80 55mm / 5.7 3.1 2.2in. 250-001: quick tool change holder for lathe cutting tool bits, range up to 1/2 inch. This holder is suitable for working with cuniform type 250-000. 250-002: V groove hold round shank boring bars and tools as well as square tool bits to machine end face, external, cutting, boring, etc. 250-004: use straight shank drilling and reaming, boring, etc. Equipped with a split bushing to accommodate a boring bar of small diameter. It grips with extreme rigidity. Cuts smoothly without chatter. 250-007: use square tool to make slot cut off etc. 250-010: it may be used for knurling, if square tool is used, it may process end face, extered cutting, boring etc. Otherwise we can’t guarantee the package would arrive smoothly. Return accepted in 30 days after you receive the item. Return package must be in the original packaging, item must be in new condition.