MudsharkMudshark First of all, this tool is just cool to look at. The Mudshark is designed to combine the two tools most commonly used when throwing pots: a needle tool to trim the rim at the top and a fettling knife to cut away the waste at the base. Like a real shark, the Mudshark needle is sharp and will bite, so we designed it to fold away when you dont need it. Safety first! Your fingers will thank you.