The Varilex WSF 1600 speed-controlled angle grinder from CS Unitec is powered by a powerful 12.27-amp (1,350-watt) motor and features infinite variable-speed control (2,000 - 7,300 RPM) to handle a multitude of grinding and polishing tasks. Designed and developed for heavy industrial use, the Varilex differs from a conventional angle grinder in its ability to change discs in seconds, without tools, using the patented EASY-LOCK clamping nut and spindle lock button. The spindle thread connection is a standard 5/8"-11 UNC. The weight is only 5.2 lbs. A new, ergonomic design, including a balanced handle, allows fatigue-free grinding.