An Engineering drawing contains all the necessary information like actual shape, accurate size, manufacturing method etc.

Mini Drafter is a device used to draw parallel or inclined lines very effectively with ease. This is mounted on the top left corner of the drawing board by means of a clamping mechanism which is an integral part of the device.

Drafting machine (or) mini drafter combines the function of T - Square, Set - Square and Protector.

Grades of drawing pencils are organized in a scale based on softness or hardness. An "HB" pencil is found directly in the center of the scale.

"H" pencils feature harder graphite. (The "H" stands for "hard".) "B" pencils feature softer graphite. (The "B" stands for "black".)

The number found in front of the letter reveals just how soft or hard the pencil is. In other words, a "4H" pencil is harder than a "2H" pencil while a "4B" pencil is softer than a "2B" pencil.

Harder pencils produce lighter marks since less of the material is released as pressure is applied. Softer pencils make darker marks since more of the material is released. Therefore, a "4H" pencil will produce lighter marks than an "2H" pencil while a "4B" pencil will make darker marks than a "2B" pencil.

In engineering drawing pencils are classified into different grade according to Intensity of blackness and Hardness.

The area of each of the A paper sizes are set by the A paper size definitions. A0 is defined as having an area of 1 square metre, however the A paper size standard also specifies that each size is rounded to the nearest millimetre.

Thus A0 is 841 mm x 1189 mm giving an area of 0.999949 square metres. Approximately surface area of A0 size sheet is One Square Meter.