Universal Tool 2.3HP Vertical Grinders feature a motor that prevents stall under load and a safety lock-off throttle. Universal Tool 2.3HP Vertical Grinders are also governor controlled to maintain speed for optimum material removal and feature a double bearing spindle design for durability. Universal Tool 2.3HP Vertical Grinders are designed with a built-in exhaust silencer system and are power packed with a 2.3HP Six Vane Motor.Universal Tool 3.0HP &amp 4.0HP Vertical Grinders are designed with a governed motor for constant speed and housing that is made from high grade aluminum alloy for maximum strength. Universal Tool 3.0HP &amp 4.0HP Vertical Grinders feature a safety lock-off throttle and side assist handle for operating comfort, internal silencing that reduces noise level, and wheel guards and flanges that follow ANSI standards.Universal Tool Vertical Grinders are best suited for heavy duty continuous grinding.