The New QuietSharp Glow Classroom Pencil Sharpener (EPS11HC) from Bostitch covers all areas for teachers and users. This sharpener has the tool free replaceable cutter. This cutter makes replacement easy, simple, fast and not to mention.. Saves you money!!! When the blades get dull, don"t get a whole new sharpener.. just replace the cutters. All you have to do is remove the dial, twist the cartridge and twist on the new cutter... it"s that easy!