The qualified tools which can be adjusted to the dimensions by using several adjustable buttons on the tool shank are known as semi qualified tools. These tools demand regular maintenance and calibration for accurate dimensioning. Solid tools are usually made of High speed steel or High carbon steel.

Steel is a popular choice for manufacturing tool holders in CNC machines. It is strong, durable and resistant to wear, making it ideal for holding cutting tools. Steel tool holders can be further treated with heat to increase their hardness and improve their resistance to wear.