Chicago Pneumatic CP9104Q Kit Compact pencil grinder. This air tool is with 3 mm and 1/8" collets included. Very low noise level: only 71dB(A). Air grinder CP9104Q is with good power size ratio. High free speed: 60,000 rpm. Extremely easy to handle. This air grinder is quiet and lightweight. Ideal for tight access application. Air grinder CP9104Q is manufactured by Chicago Pneumatic.