Metal Strip Technique proves to be very handy when it comes to rectification of bad effects of toilets and entrances without making any demolitions. Metal Strip Technique proves to be very handy when it comes to rectification of bad effects of toilets and entrances without making any demolitions. There are five types of metal strips- SS Strip, Brass Strip, Aluminum Strip, Copper Strip, which are used to negate the harmful effects of unbalanced entrance and toilets.