Swingline Replacement Blade for SmartCut Commercial Series Paper Trimmers, Straight Blade (9613RB) READY REPLACEMENT  Convenient replacement blade works to slice through papers to complete your trimming projects. EASY TO INSTALL  SmartCut blade is easy to install, and designed to work with several different trimmer models. For use in SmartCut Commercial Heavy Duty Rotary Trimmers 9624, 9618, 9615, 9612. CONVENIENTLY CONCEALED  Rotary blade is designed to fit inside sturdy plastic housing, to increase user security, so that there's never a risk of fingers coming in contact with the blade.