1. According to the needs of the workpiece, the corresponding tool holder can be to process outer circle, end face, cutting,knurling,drilling reaming, boring, etc. 2. The tool holder is installed on the tool holder by swallow-tail groove. It has the characteristics of fast tool changing, high positioning accuracy and so on. 3. The tool holder is the main accessory of ordinary small lathe. It is composed of one tool holder and several cutter clips. According to the need of machining workpiece, the corresponding tool holder can be . It can be used for machining outside circle, end face, cutting, knurling, drilling hole, boring, etc. 4. With a of sizes of drill bits, turning and finishing tools can be locked together. accurate grinding and hardening. Turning and trimming tools can be locked together (save time and effort when changing operations). Installed on engine, worktable or turret bed quickly and easily, suitable for all kinds of operations from accurate machining to heavy cutting. 250-001 Tool Holder: Model Number: 250-001 Turing and Facing tool holder Tool bits range: up to 1/2inch Matched Tool Post: 000 Wedge type Tool Post Can't use with Mini Aluminum Quick Change Tool Post For use with 0XA tool post 250-000 up to 8inch swing. Securely holds up to 1/2inch square diameter tool bits Interchangeable with for Dorian, Aloris, and Phase II series mini tool posts. 250-002 Tool Holder: Holding Range:3/16 inch~1/2 inch Colour:black Material:steel Package Contents: 2x Cnc Lathe 250-001 Tool Holder 1x Cnc Lathe 250-002 Tool Holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.