Check the listing for details. Drywall Mud Blade 3". Condition: New. Listed at 1.50 USD. The Drywall Mud Blade 3" is a specialized taping tool used in the drywall industry. With a 3" blade, this tool is designed to easily apply and smooth out mud on drywall walls. It is a crucial piece of equipment for professionals in the drywall trade who need to achieve precise and smooth finishes. Its compact size and specific design make it a valuable addition to the toolbox of any contractor or tradesperson working on drywall projects.