This heavy-duty knife is part of the HandSaver Knife Series featuring anti-slip cushion grip handles. HandSaver® handles provide premium comfort, and maximum performance. An acetone resistant, elastomer handle with a poly-acetate locking mechanism, makes it an official acetone resistant cutter. It features a ratchet wheel blade lock and a heavy gauge stainless steel blade channel that holds blade tight. Blades are made from high quality carbon tool steel are produced using OLFA precise multi-step production process for unparalleled sharpness and superior edge retention. Long lasting, durable snap-off blade - a new sharp edge with each snap. Easy, tool-free blade change for convenience. Guaranteed Forever.