A rack is a metal support designed to house electronic, computer and communications equipment. The measures for the width are normalized to be compatible with most equipment manufacturers. They are also called racks, cabinets, cabinets or closets. Each column has holes at regular intervals called U rack units (Pictured: 4) grouped in threes. The height (Pictured:5) of the racks is standardized and external dimensions of 200 mm by 200 mm. Being normal that from 4U to 46/47U height width types (Pictured: 7). Standard 600 mm or 800 mm Types of background (Pictured: 6) The depth of the frame is not standardized, as this flexibility is granted (Pictured: 8) to the equipment. The most common are: - 450 mm - 600 mm - 800 mm - 900 mm - 1000 mm - 1200 mm Type 19-inch rack can find various types of 19-inch rack. Rack Mural (Pictured: 2): Used to accommodate electronic network. They are the smallest and are anchored to wall. Rack Pie (Pictured: 1): They are used primarily for servers, UPS and network electronics. Open Rack (Pictured: 3): Open Rack Racks are available only modelsstructure, eliminating doors and other accessories.

The DIN is a standard that was developed by the "Deutsches Institut für Normung" (one might call the national standards organization in Germany). The DIN is facing many sectors, but we have tried to focus on the DIN-oriented electronics and computing. In the case of Enclosures means qualifying under the German legislation on racks and is standardized to DIN 41494-7.

Although there are infinity tips as manufacturers or type of use, these are the most commonly tips used in the electronics industry, hardware or electricity.

1. Slot: Characterized by its flat and elongated tip.

2. Phillips: It may be the most used, its tip is shaped like a four-pointed star. Also called commonly screwdriver

3. Pozidriv: Like the previous model, but with a twist. Inside it has 4 slots in a star more.

4. Torx: Widely used in vehicles, its shape is a star with 6 points.

5. Security Torx: Same as above, but inside has a pin.

6. Hex: Point-shaped or hexagon Allen calls. Such tips are distinguished from the rest because they are able to withstand higher torque strength.

Nylon or nylon is a polymer of artificial origin that belongs to the group of polyamides, based on a composition of diamine and diacid chloride.
According to the amount of carbon atoms in the chains of the amine and chloride, it is indicated behind the name, for example, the most common nylon 6.6.

Nylon as it is a very elastic and resistant material is ideal for the textile industry, mainly used foror in the manufacture of stockings in the USA.
Its application was extended until today, where not only do we find nylon in the textile application, but its applications have varied, being able to find this material in utensils, and machinery.