Polishing machine controller-- suitable for work scenarios such as metal processing and wood processing . Controller for angle -- with fine workmanship, simple and very practical in use, easily win your favors. Speed controller-- can be used to electric tools, improving their efficiency and convenience. Speed controller for polishing machine-- the powerful design of this electric tool that tasks are completed efficiently and effectively. Polishing machine part-- with fine workmanship, simple and very practical in use, easily win your favors. Colour:black Material:plastic style:A Small Electric Mill Governor Package Contents: 2 * Speed regulator Only the above package content, other products are not included. Note: Light reflection 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.