3 or 8 Inch Boring Holder Quick Change Tool Post Holder Mini Lathe Metal Working ToolColor: Black Material: Aluminum Alloy Tool Post Type: Quick Change Tool Post Size: 1 x 3 or 8andprime Boring Holder Features: andndash The use of multiple tool holders form an artificial tool magazine, can repeat replace tool holder andndash Using the dial, each tool holder can be rotated multiple angle of 9 degree operations with extension units, can be processed various angles workpiece andndash Tool holder for the adjusting screw nut and tool, adjust installation height, easy to operate, shortening the time loaded andndash Each changing tools only takes a few seconds andndash The tool post, high stability processing, modeling novelty, compact structure, tool change rapid, good rigidity, high precision machining