XHC cutter technology for 70% faster sharpening and 10x longer life. Super-duty QuietSharp motor for quiet stall-free operation under normal use. Tamper-proof Magna Safe safety switch prevents operation when shavings tray is remove. Thermal-overload protection for extended motor life. Tip Saver Technology extends pencil life by preventing oversharpening. Large volume easy-clean shavings tray. Oversized base with suction cup feet for extra stability during use. One-hand easy-turn six-size pencil selector dial. BOSTITCH Blue Sharpener