Vertical sharpening for those who demand the best. HHC™ cutter technology outlasts single blade models by up to 6X. Tip Saver Technology™ produces a precision point every time and prevents over-sharpening, extending pencil life. Quiet Sharp™ heavy-duty motor for quiet, stall-free operation. Thermal overload protection and easy clean shavings tray with safety switch that prevents operation when tray is removed.