10N2080-01 Dotco 10-20 Series Inline Grinder. The Dotco 10-20 Series Inline Grinder is made of durable aluminum housing, and is designed to work comfortably with the operator. Also the Dotco 10-20 Series Inline Grinder is available with front, side, and rear exhaust models and with a 200 or 300 Series Collet. Collet Size: 1/4” Exhaust: Rear Throttle Type: None Free Speed (rpm): 25,000 Abrasive Capacity: 3/4” Carbide Burr, 1.5” Mounted Wheel Type Housing: Aluminum Weight: 1.3lbs/0.59kg Overall Length: 5.8”/147mm Air Inlet Size: 1/4”