Rotus Standard Set - 30,000RPM sku: 8507250 ROTUS STANDARD SET Air Powered Hand Grinder System 850-7250 The ROTUS System is a hand-held grinder with an energy saving air motor hand piece weighing only 8.74 oz. Air driven means that there is virtually no heat generation during operation... MSRP: On Sale: $1,170.00 Add to Cart Compare