This extra heavy-duty knife is part of the X OLFA Design Series, a powerful line of anti-slip grip cutting tools combining exceptional performance with innovation. Features a ratchet lock, cushion grip for maximum comfort and control, heavy gauge stainless steel blade channel that holds blade tight and chemical resistant handle for easy cleaning. Easy tool-free blade change for convenience. The blades 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 blades - a new sharp edge with each snap. Uses HB replacement blades. Guaranteed Forever.