1Turing and facing can change tool holder quickly. 2Suitable for lathe swing 3/16in- 1/2in, efficient "V" groove design for securely fixing round shank tool. 3Firmly secure the 3/16in-1/2in square diameter tool. 4With a variety of sizes of drill bits, turning and facing tools can be locked together. 5Save time and labor when changing operations. 6Can be used forAXA tool post 250-111. 7Made of steel, not aluminum. Precision grinding and hardening. 8Maximum rigidity without vibration performance. 9Turning and facing tools can be locked together (saving time and labor during replacement operations) 10Quick and easy to install on an engine, table or turret lathe for a wide range of operations from precision machining to heavy duty cutting. 11Can be interchanged with Dorian, Aloris and Phase IIAXA series tool holders.