Each Person Who Started at Least Not a Big Repair Will Meet with The Installation of Doors, Interior Or Input. Of course, ifis matter Isasted with Professionals, Installers of the Company, the there will be no problems. But there People Who Themselves Want to this Work. And at the Same Time, Not EveNe Knows How to Do It, Or Know The Basis of Work, But Do Not Know The Details. Independent Installation is Much Cheaper, TheFore it is Attractive, But as Mentionaled ABOVE, There ARE NUANCES. It is on that in this article Will BE Discussed. FIRST You Need to Be Caust by Tools, Namely: Necessarily: Roulette and Level.