Guillotine-gates need to slide easily - our HDPE rails never need lubrication! Nor will the rails collect hair - which is what causes the other slide-rails to fail. The extra-thick HDPE material cleans easily and can be used for a variety of guillotine-type doors. Screw this rail directly to the wall and drop your gate in place! Will not rot or rust! These are replacement rails, our Guillotine-gates come with two rails standard.