I really could not do without this tool. The most popular cutter size available the RTY2 uses the standard 45mm rotary blade. Features include a blade slide safety cover and handle that is designed to reduce hand fatigue. Accommodates both right- and left-handed users. Perfect for general quilting sewing and craft projects. This cutter can also be used to cut wallpaper and veneers for woodworking. Uses RB45-1 and RB45-5 replacement blades.