In our daily life, the chisel this seemingly ordinary tool plays a vital role. Whether you're a woodworker, decorator, or a DIY enthusiast, you'll probably need a chisel at some point. However, in the face of a wide range of chisel specifications on the market, have you ever felt confused and do not know how to choose? 

1. Definition & History
A chisel is a hand tool for cutting or carving wood, metal, or stone by striking with a mallet or applying pressure. It consists of a blade and a handle. Chisels date back to the Stone Age, with metal versions emerging in the Bronze Age. Modern chisels are typically made of high-carbon steel or alloy steel.

2. Classification of Chisels
Chisels can be categorized by function and blade shape:

① Woodworking Chisels
Bench Chisel: Flat blade for general shaping (6mm–50mm wide).
Paring Chisel: Long, thin blade for precision shaving (hand-pushed).
Mortise Chisel: Thick blade for chopping mortises (6mm–20mm wide).
Gouge Chisel: U-shaped blade for carving curves.

② Masonry Chisels
Flat Chisel: Wide blade for splitting stone.
Point Chisel: Tapered tip for rough stone work.
Tooth Chisel: Serrated edge for texturing.

③ Metalworking Chisels
Cold Chisel: Cuts unheated metal (60°–75° edge angle).
Hot Cut Chisel: Forged for high-temperature use.

④ Specialty Chisels
Power Chisel: Attaches to pneumatic/electric tools.
Carving Chisel: Miniature blades for detailed art.

3. Key Specifications
Blade Width:
Wood: 6mm–25mm.
Masonry: Up to 50mm+.

Bevel Angle:
Wood: 20°–30°.
Metal: 60°–75°.

Length:
Handheld: 150mm–300mm.
Masonry: 400mm+.

Material:
High-carbon steel (sharp but rust-prone).
Chrome-vanadium alloy (durable).
Tungsten carbide (industrial-grade).

4. Usage & Maintenance
Safety: Wear goggles; secure the chisel before striking.
Care: Sharpen regularly (20°–30° angle); oil metal chisels.

5. Buying Tips:
Beginners: 6mm/12mm/18mm bench chisel set.
Masonry: Heavy-duty octagonal handles.