The AIRCAT 6340 is the only One-Handed 4 1/2" Angle Grinder on the market. It is the smallest, most compact angle grinder available which allows you to reach tight areas with the most user friendly features. For power we put a full 1 HP motor that runs at 11,000 RPM in the 6340 to prevent stalling and adding durability. The unique tapered head allows you to reach tight areas that other 4 1/2" Grinders cant. The spindle is 5/8" X 11 which is the most popular on the market and allows the greatest selection of grinding wheels. For safety the 6340 has a multi positional rotational guard which allows greater access and a rotational muffler to control the direction of the exhaust mounted to the back of the tool. For user comfort the 6340 has a composite grip and ergonomic designed throttle trigger. In addition there is Hi-Low speed adjustment knob located on top of tool for control. There is also a Spindle Lock for easy wheel change. The air inlet is 1/4" NPT and the 6340 comes with the standard AIRCAT 2 Year Warranty.