The Metabo RSEV 17-125 Set, 5" Pro Series Variable Speed Concrete Grinder is German engineered and manufactured for durability, safety, and productivity in a broad range of Heavy Duty dustless concrete grinding and restoration applications such as edge work, flooring prep, coating removals, leveling, and removal of parting lines. The powerful LongLife 14.5 Amp, AC/DC, Variable Speed 2,800-9,600 RPM motor delivers up to 50% more torque for faster material removal and up to 20% higher overload capacity for ultimate durability. The electronic features include Soft Start, Metabo's VTC (Vario Tacho Constamatic) Speed Stabilization for ultimate productivity, and electronic Overload Protection. For cooler operation and extended longevity in demanding working environments the patented motor includes: unobstructed rear air intake, optimized internal air flow, and epoxy coated copper windings that extend outside of the field coil for advanced heat dissipation and protection from abrasion. In addition, the winding protection grid extends the life of the armature up to 5 times in harsh environments. The grinder's safety is enhanced by the patented Metabo S-Automatic mechanical safety slip clutch which reduces the likelihood of kickback by helping the user maintain control if the accessory jams. The ergonomic grip design reduces fatigue and includes a Lock-on slide switch that provides comfort for extended grinding applications. The Metabo MVT Anti-Vibration Side Handle is designed with a bulb-shaped grip and 15-degree offset to reduce vibrations by up to 60%, providing optimal handling, reduced fatigue, and excellent ergonomics by distributing forces evenly across the hand, lowering the risk of long-term work-related disorders of the hand, wrist and arm. A 5" convertible dustless guard, which allows grinding flush to a wall, as well as a 5" double-row Diamond Cup Wheel are included in the MetaLoc carrying case. The die-cast aluminum gear housing is designed to dissipate heat from the motor, features oversized bearings and heavy-duty gearing. For compliance with OSHA Respirable Crystalline Silica standards or Table 1 compliance standards, Metabo's full line of concrete tools are designed for use with Metabo dust extraction attachments and vacuums. When used correctly they meet or exceed OSHA silica standards.