End the Troublesome Work of Constantly Changing Drill Bits! Various Adjustable Diameters: With multiple adjustable diameters from 30mm to 300mm, this wood drilling machine allows holes of different diameters to be cut with one tool, saving money and space. Alloy steel beam has marked grades for fast measuring and precision cutting. Double blade design, flat round effect, smooth cutting and burr-free. Widely Used: Plywood, laminate, composite materials, rubber, plastic, etc. It can be used to cut various materials such as OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.