The heat-resistant green coating of the groove cutter sets prevents the accumulation of sawdust, resin, and asphalt, making your work more efficient. Please take protective measures during operation to prevent wood chips from hurting your eyes. Suitable for wood panels, medium density fiberboards, particleboards, plywood compression boards, etc. Do not cut ferrous metals and non-wood materials such as steel, iron, sand, etc. Perfect for woodworking, edging, trimming, grooving, and refining wood projects, these router bits are ideal for woodworkers and hobbyists of all experience levels. Shank diameter: 6 mm. Includes 7 different sizes of groove cutters to meet the basic needs of wood grooving. (Please note the size and fit before purchasing Note: The data are all manually measured, please allow an error of 1-3 cm. Due to differences in light and display, there will be a certain color difference, please refer to the actual object received.