What is the relationship between a screwdriver and a screwdriver?

A screwdriver is a complete product, while a screwdriver is a replaceable blade of the screwdriver. The quality of the screwdriver directly determines the quality of the screwdriver, and these two are in a subordinate relationship.
A screwdriver is a tool used to twist a spider nail to force it into place, usually with a thin wedge-shaped head that can be inserted into the groove or groove of the screw head, also known as a "screwdriver". It is a component of a screwdriver, which is a different screw head and is a part of the screwdriver.
Screwdrivers can be classified into straight, cross, beige, star, square, hexagonal, and Y-shaped heads according to different head shapes. One of the characters and the cross are the commonly used in our daily lives, and it can be said that wherever there is a screw, a screwdriver is needed.