1 3/4 inch (44mm) ball with 1 1/4 inch (32mm) hole to fit 16 oz. hammer. Never leave behind marks or dents again with our 100% wool felt hammerhead! Perfect for doorframe molding, drawers, installing dowels and hardwood flooring, our high quality felt ensures a flawless finish. Simply place the hammerhead felt over the head of your hammer and avoid leaving those unsightly marks, dents, chips, nicks or blemishes on your woodwork.