The OLFA SK-7 has a compact handle. It is has a spring retractable safety design. It will automatically retract the instant the blade loses contact with the cutting surface. By simply reversing the way the blade fits into the blade slide, this knife can be used right or left handed. The blade slide is recessed so the user can easily slide the cutter into their pocket without fear of the blade being extended. This cutter uses the SKB-7/10B replacement blades.