Planers are manual woodworking tools designed for shaping and smoothing wood surfaces by removing thin layers of material from their surfaces. This process is called "planing." Planers are used to level and smooth wooden surfaces, create chamfers, bevels, shape wood, and prepare it for finishing. They are essential tools in carpentry and woodworking.

The main features and functions of planers include:

1. Planer Blade: Planers have a sharp-bladed edge that removes a thin layer of wood when passed over the surface.

2. Depth Adjustment: Many planers are equipped with mechanisms to adjust the depth of cut, allowing for precise control of the thickness of material to be removed.

3. Types of Planers: There are several types of planers, including hand planes, block planes, and electric planers. Each type is designed for specific tasks and work scales.

4. Cutting Angle: Planers can have various cutting angles, which influence the character and quality of woodwork.

5. Applications: Planers are used to create smooth and flat wooden surfaces, chamfers, bevels, remove imperfections, and process wood before finishing.

Planers are widely used in carpentry and the woodworking industry. They enable craftsmen and woodworkers to achieve high precision and quality in their work, creating smooth and beautiful wooden products.