Brass Tower Bolts As shown in the figure, we offer Brass tower bolts door bolts stoppers . ¼" Tower bolt from 2" and up to 6". Other types are of 516" 38", 12" etc. WE ARE SPECIALIZED IN LONG SERIES TOWER BOLTS 12" X 36" WITHOUT ANY JOINT. Second Tower Bolt from the top is a square type Tower Bolt. All standard polishes are available.