1、More Comfortable Use: Ergonomic and lightweight design, The air die grinder making it more comfortable to use for longer periods of time. 2、Easier Handling: Small and light design makes the air die grinder handling easier and easier to access tight places. 3、Ball Bearing Construction: Durable ball bearing construction improves the balance of the grinder, reduces vibration and ensures longer life. 4、Pencil Shaft: This engraver features a pencil shaft that provides control and maneuverability when cutting, grinding and polishing appearances. 5、Aluminum Alloy, ABS Material: Made of aluminum alloy and ABS, this air die grinder is wear resistance, durable and corrosion resistance, suitable for long term use.