What are the parts of an engineering drawing?

Engineer's Tip
	The tip of the scriber, also called the tip, is the part that actually makes the markings. Tips are usually made of tungsten carbide, hardened steel, tool steel or diamond tipped steel and can be replaced on some models.
	What types of interchangeable marking tips are available? There are different types of interchangeable marker tips for different purposes and types of markers. When purchasing spare tips for your striper, first make sure the replacement tips are compatible with your specific tool. Some replacement nibs are designed to screw into the body of the striper while others require a chuck to hold them in place.
Engineer's Marking Chuck
	The chuck secures the tip to the body of the marker and is only used on markers with interchangeable tips.
	How does the chuck hold the tip? The tip of the scriber is placed in the shell between the guide jaws. Then a cap is put on the tip and screwed to the shell. In doing so, the guiding jaws are squeezed together, pinching the tip, holding it in place.
Engineer's marking body
	The body of the scriber is also sometimes referred to as the shaft or handle. This part of the scriber can be made from a wide variety of materials. Interchangeable tip scribers usually have a metal body and often have a serrated surface to improve grip and prevent the scriber from slipping in the user's hand.
Engineer's Clip
	The clip is only found on typist or pocket scribers and is used to secure the scriber and store it conveniently in a jacket pocket. It also serves to prevent the scriber from rolling off work surfaces.
Marking head of an engineer
	On pocket scribers, the head is often hexagonal to prevent the scriber from rolling off work surfaces.
Additional Features of the Engineer's Marker
	Bilateral tips For scribers with detachable tips and a chuck, the tips can be turned upside down and sunk into them. This helps protect the tip from damage and makes the scriber shorter and easier to store when not in use.
	Magnetic head Some scribers are available with magnetic heads to quickly and easily capture metal filings from the surface of the workpiece, thereby preventing possible damage. These are commonly found on machinist's road marking machines and are useful if you are mainly marking out iron or steel.