The heat-resistant green coating of the grooving cutter set prevents the accumulation of sawdust, resin and asphalt and improves the efficiency of your work. Please take good protective measures during operation to prevent wood chips from harming your eyes. Suitable for wood board, medium density fiberboard, particle board, plywood compact board, etc. Do not cut ferrous metals and non-wood materials such as steel, iron, sand, etc. These cutters are perfect for woodworking, edging, cutting, grooving and finishing wood projects and are ideal for woodworkers and hobbyists of all experience levels. Knife handle diameter: 6 mm. Includes 7 different sized grooving cutters that meet the basic needs of grooving in woodworking. (Please pay attention to the size and suitability beforehand Note: The data is all manual measurement, please allow an error of 1-3cm. Due to the difference in light and display, there may be a certain color difference. depending on the physical object received.