Swingline Optima Pencil Sharpener is the ultimate in fast, quiet and reliable sharpening. Powerful AC motor combined with carbon steel blades provide a perfect pencil tip in seconds, while being quiet enough for noise-sensitive environments. Movable dial accommodates six different pencil sizes including triangular student pencils. Translucent, spill-resistant shavings receptacle eliminates mess and allows you to see when it is full. Storage area organizes pencils. Lead saver feature prevents oversharpening and thermal cutoff prevents overheating.