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. 3 inches center to center. Includes mounting hardware. Decorative hardware for drawers and cabinets. Dimensions: 3.56W x 1D x 0.5H in..