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The 4" Hammer Head Flexible Joint Knife features a precision-engineered design built for demanding drywall and finishing work. Its flexible joint allows seamless transitions around corners and edges, while the hammer head construction provides dual functionality for both application and fastener work. The durable nylon handle delivers comfortable grip and reliable control during extended use. Black and silver finish resists corrosion and maintains professional appearance. An essential tool for contractors and experienced finishers seeking efficiency and versatility in joint compound application.