Two Sizes Available These Early American Style knobs are made of solid turned brass. Turned knobs are made by a solid bar of brass being turned on a lathe and cut. The result is a beatuful, refined finish with great detail. This knobs are great compliment to our Queen Ann pulls. Also availalbe in an Antique Finish. BK-139 has a 7/8" diameter and a 7/8" projection. The base is 1/2" in diameter. BK-140 has a 1" diameter and a 7/8" projection. The base is 9/16" in diameter.