Isocore, 4 lb, rugged, powerful club hammer, allows you to take on intense demolition tasks while helping to reduce muscle fatigue & joint pain, premium steel is forged into a unique head featuring a wedged demolition face to maximize destructive force & an extra large driving face for improved strike accuracy, performance handle design fits your hand securely & comfortably when swinging with maximum force, & strategic texturing helps improve grip while reducing blisters.