About Top Knobs With strong roots in attention to architectural detail and high quality materials, Top Knobs is one of the best names in home hardware today. With a complete line of hand-finished knobs and pulls in nearly every style imaginable, their products are enhancing the look of homes all over the country. You"ll find a wide variety of beautiful finishes and designs, every one of which comes with a lifetime guarantee. Constructed of zinc alloy. 5.31 inches center to center. Includes M4 screw pack for easy installation. Choose from available finish options. Dimensions: 6.56W x 0.87D x 0.68H in..