The BosScrew is a technological breakthrough from Bertolini.  After discovering that one of the opportunities for improvement was screws becoming loose after years of use in a church chair, the engineers at Bertolini developed the BosScrew.  The concept is simple.  A serrated screw was developed along with a blow molded chamber for the screw to fit into.  Instead of the standard screw drilled into a piece of plywood such as the competitors use the BosScrew tightens over time with regular use.  Gone are the days of flimsy church chairs and having to try to rescrew in parts found on the floor.