Trustworthy. Fast. Large wood splitter! No moving parts or sharp knives are required, making the fork easy and safe to burn. This will be one of the tools you buy at a time and the maintenance is very small. The product is made of cast iron, which is very strong and can take a very hard blow when the wood is removed. The inner diameter of the top ring is 6.5 inches (approx. 16.5 cm). Simple design, bulletproof, super sturdy, round top makes it easy to carry, there are 2 bolt holes at the bottom, the fixed height can be adjusted according to personal height, the extra height will protect your back. 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.