The Grey Pneumatic GRY-4046R 1 DR x 1-7/16 STND is a 1-7/16 inch diameter x 1-3/4 inch height grinder with a 4046 RPM motor. It has a 0-3,000 RPM range and a 0-1,500 RPM range. It has a 0-6,000 RPM range and a 0-12,000 RPM range. It has a 0-40,000 RPM range and a 0-100,000 RPM range. It has a 0-4,000 GPM (gallon per minute) flow rate and a 0-8,000 GPM (gallon per minute) flow rate. It has a 0-1,000 PSI (pounds per square inch) pressure rating and a 0-3,000 PSI (pounds per square inch) pressure rating. It has a 0-6,000 BTU (British thermal unit) rating and a 0-12,000 BTU (British thermal unit) rating. It has a 0-40,000 BTU (British thermal unit) rating and a 0-100,000 BTU (British thermal unit) rating.