1、This tool holder enables tool installation outside the machine. Can be easily installed through the dovetail groove, and the changing will be quicker. 2、Turning and face steering tools can be locked together, which will provide great stability and ensure no vibration to prevent blade breakage. 3、Allows for flexible application in various circumstances, including in machining, automobile manufacturing, military manufacturing and so on. 4、Can perform turning, grooving, cutting, knurling, drilling and other operations, also can be used for reaming, boring and other processing. 5、Made of high quality 40Cr steel, the post change tool is not easy to deform, and very durable for long term use as well. 1 x Tool Post Holder Item Type: Tool Post HolderMaterial: 40CRColour: BlackProduct Size: Approx. 77 x 77 x 25mm / 3 x 3 x 1inTool Bit Range: 3/16-1/2in