Professional plumbers insist on Johni-Bolts® -- the original, patented, solid brass closet bolt with time-saving snap-off slot and captive washer. A pair of pliers easily snaps off the top of the bolt. Captive washer keeps bolt upright and prevents it from falling through the flange. Oversized solid brass acorn nuts, stainless steel washers. Specially designed head fits into every flange and slides easily into position.