12L2002-01 Dotco 12-20 Series Inline Grinder. Dotco 12-20 Series Inline Grinder features ergonomic composite housing and is designed to work comfortably with the operator. Front and rear exhaust models of the Dotco 12-20 series Inline Grinder with 200 series collet are available. Standard models are equipped with a 200 series collet. Collet Size: 1/4” Exhaust: Front Throttle Type: Lock Off Lever Free Speed (rpm): 18,000 Abrasive Capacity: 3/4” Carbide Burr, 1.5” Mounted Wheel Type Housing: Composite Weight: 1.4lbs/0.64kg Overall Length: 6.9”/175mm Air Inlet Size: 1/4”