●When beginner practices darts, remove the board or fall on a hard ground, the dart point tip and shaft will easily break into the barrel ●In this case, the broken dart shaft can be easily removed using the dart breakaway tool to allow you to reuse the barrel ●Material:Iron Alloy,Length without Chain:4.5cm,Diameter :7.5mm ●【Warranty】If there is any problem within 90 days, you can return it or refund the new one. Contact us via email: vastelement@foxmail.com