1. Hole saw color: mostly black color, any color such as yellow, red, green etc is avaialbe upon your request.

2. overall fine heat treatment for all hole saws to ensure strong cutting, deep cutting depth and longer cutting life.

3. For cutting woods, plastics and composite materials up to 3/4" thick. Teeth are precision sharpened to produce smooth cuts. Constructed of hardened and tempered alloy steel for longer life.